diff --git a/functions/index.js b/functions/index.js
index 403baad..da38868 100644
--- a/functions/index.js
+++ b/functions/index.js
@@ -2,7 +2,7 @@
 /* eslint-disable no-tabs */
 const functions = require("firebase-functions");
 const admin = require("firebase-admin");
-const { ChatSharp } = require("@material-ui/icons");
+const { ChatSharp, DiscFull } = require("@material-ui/icons");
 admin.initializeApp();
 const db = admin.firestore();
 
@@ -49,103 +49,122 @@ exports.userDeleted = functions.auth.user().onDelete(async (user) => {
 /**
  * Creates new progress document.
  * @param {object} data The data passed to the function.
- * @param {string} data.set_id The ID of the desired set.
+ * @param {array} data.sets An array of IDs of the desired sets.
  * @param {boolean} data.switch_language Whether or not the languages should be reversed.
  * @param {boolean} data.mode The mode to be tested in. Valid options are "questions" and "lives".
  * @param {boolean} data.limit The maximum number of lives/questions for the test.
  * @return {string} The ID of the created progress document.
 */
 exports.createProgress = functions.https.onCall((data, context) => {
-	// const uid = context.auth.uid;
-	const uid = "user_01";
-
-	const setId = data.set_id;
+	const uid = context.auth.uid;
+	// const uid = "user_01";
 	
-	const setDocId = db.collection("sets").doc(setId);	
+	if (!data.sets || data.sets.length < 1) {
+		throw new functions.https.HttpsError("invalid-argument", "At least one set must be provided");
+	} else if (Number.isInteger(data.limit) || data.limit < 1) {
+		throw new functions.https.HttpsError("invalid-argument", "Limit must be an integer greater than 0")
+	}
+	else {
+		return db.runTransaction( async (transaction) => {
+			const sets = data.sets;
+			const setsId = db.collection("sets");
+			let allSetTitles = [];
+			let allVocab = [];
 	
-	return db.runTransaction((transaction) => {
-		return transaction.get(setDocId).then((setDoc) => {
-			if (!setDoc.exists) {
-				throw new functions.https.HttpsError("not-found", "Set doesn't exist");
-			} else if (!setDoc.data().public && setDoc.data().owner !== uid) {
-				throw new functions.https.HttpsError("permission-denied", "Insufficient permissions to access set");
-			} else {
-				const switchLanguage = data.switch_language;
-				const mode = data.mode;
-				const limit = data.limit;
-
-				const setTitle = setDoc.data().title;
-				const setOwner = setDoc.data().owner;
-				
-				const correct = [];
-				const incorrect = [];
-				const currentCorrect = [];
-				const progress = 0;
-				const startTime = Date.now();
-				const setVocabCollectionId = db
-					.collection("sets").doc(setId)
-					.collection("vocab");
-				const progressDocId = db
-					.collection("progress").doc();
-
-				return transaction.get(setVocabCollectionId).then((setVocab) => {
-					let dataToSet = {
-						questions: [],
-						correct: correct,
-						current_correct: currentCorrect,
-						incorrect: incorrect,
-						progress: progress,
-						start_time: startTime,
-						set_title: setTitle,
-						uid: uid,
-						switch_language: switchLanguage,
-						duration: null,
-						set_owner: setOwner,
-						mode: mode,
-					}
-
-					shuffleArray(setVocab).forEach((doc, index, array) => {
-						const vocabId = doc.id;
-
-						const terms = {
-							"item": doc.data().term,
-							"sound": doc.data().sound,
-						};
-						const definitions = {
-							"item": doc.data().definition,
-						};
-
-						dataToSet.questions.push(vocabId);
-
-						transaction.set(
-							progressDocId.collection("terms").doc(vocabId),
-							terms
-						);
-						transaction.set(
-							progressDocId.collection("definitions").doc(vocabId),
-							definitions
-						);
-
-						if (mode == "questions" && index >= limit - 1) {
-							array.length = index + 1;
-						}
-					});
-
-
-					if (mode === "lives") dataToSet.lives = limit;
-					
-					transaction.set(
-						progressDocId,
-						dataToSet
-					);
-
-					return progressDocId.id;
-				});
+			async function asyncForEach(array, callback) {
+				for (let index = 0; index < array.length; index++) {
+					await callback(array[index], index, array);
+				}
 			}
+	
+			await asyncForEach(sets, async (setId) => {
+				return transaction.get(setsId.doc(setId)).then((setDoc) => {
+					if (!setDoc.exists) {
+						throw new functions.https.HttpsError("not-found", "Set doesn't exist");
+					} else if (!setDoc.data().public && setDoc.data().owner !== uid) {
+						throw new functions.https.HttpsError("permission-denied", "Insufficient permissions to access set");
+					} else {
+						const setVocabCollectionId = db
+						.collection("sets").doc(setId)
+						.collection("vocab");
+						
+						return transaction.get(setVocabCollectionId).then((setVocab) => {
+							allSetTitles.push(setDoc.data().title);
+	
+							return setVocab.docs.map((vocabDoc) => {
+								let newVocabData = vocabDoc;
+								newVocabData.vocabId = setDoc.data().owner + "__" + vocabDoc.id;
+								allVocab.push(newVocabData);
+							});
+						});
+					}
+				});
+			});
+	
+			const mode = data.mode;
+			const limit = data.limit;
+			const switchLanguage = data.switch_language;
+			const progressDocId = db
+				.collection("progress").doc();
+	
+			let setTitle;
+			if (allSetTitles.length > 1) {
+				setTitle = allSetTitles.slice(0, -1).join(", ") + " & " + allSetTitles.slice(-1);
+			} else {
+				setTitle = allSetTitles[0];
+			}
+	
+			let dataToSet = {
+				questions: [],
+				correct: [],
+				current_correct: [],
+				incorrect: [],
+				progress: 0,
+				start_time: Date.now(),
+				set_title: setTitle,
+				uid: uid,
+				switch_language: switchLanguage,
+				duration: null,
+				mode: mode,
+			}
+	
+			shuffleArray(allVocab).forEach((doc, index, array) => {
+				const vocabId = doc.vocabId;
+	
+				const terms = {
+					"item": doc.data().term,
+					"sound": doc.data().sound,
+				};
+				const definitions = {
+					"item": doc.data().definition,
+				};
+	
+				dataToSet.questions.push(vocabId);
+	
+				transaction.set(
+					progressDocId.collection("terms").doc(vocabId),
+					terms
+				);
+				transaction.set(
+					progressDocId.collection("definitions").doc(vocabId),
+					definitions
+				);
+	
+				if (mode == "questions" && index >= limit - 1) {
+					array.length = index + 1;
+				}
+			});
+	
+			if (mode === "lives") dataToSet.lives = limit;
+	
+			transaction.set(
+				progressDocId,
+				dataToSet
+			);
+	
+			return progressDocId.id;
 		});
-	});
-
-
+	}
 });
 
 /**
@@ -251,8 +270,8 @@ function cleanseVocabString(item) {
  * @return {integer} totalIncorrect Total number of incorrect answers so far.
  */
 exports.processAnswer = functions.https.onCall((data, context) => {
-	// const uid = context.auth.uid;
-	const uid = "user_01";
+	const uid = context.auth.uid;
+	// const uid = "user_01";
 
 	const progressId = data.progressId;
 	const inputAnswer = data.answer;
@@ -357,6 +376,7 @@ exports.processAnswer = functions.https.onCall((data, context) => {
 							return returnData;
 						} else {
 							const nextVocabId = docData.questions[docData.progress];
+							const nextSetOwner = nextVocabId.split("__")[0];
 	
 							if (docData.switch_language) {
 								const promptDocId = progressDocId
@@ -367,6 +387,7 @@ exports.processAnswer = functions.https.onCall((data, context) => {
 									returnData.nextPrompt = {
 										item: promptDoc.data().item,
 										sound: sound,
+										set_owner: nextSetOwner,
 									}
 									transaction.set(progressDocId, docData);
 									return returnData;
@@ -380,6 +401,7 @@ exports.processAnswer = functions.https.onCall((data, context) => {
 									returnData.nextPrompt = {
 										item: promptDoc.data().item,
 										sound: sound,
+										set_owner: nextSetOwner,
 									}
 									transaction.set(progressDocId, docData);
 									return returnData;
@@ -405,10 +427,10 @@ exports.processAnswer = functions.https.onCall((data, context) => {
  * @return {promise} The promise from setting the target user's admin custom auth claim.
 */
 exports.setAdmin = functions.https.onCall(async (data, context) => {
-	// const uid = context.auth.uid;
-	// const isAdmin = context.auth.tokens.admin;
-	const uid = "M3JPrFRH6Fdo8XMUbF0l2zVZUCH3";
-	const isAdmin = true;
+	const uid = context.auth.uid;
+	const isAdmin = context.auth.tokens.admin;
+	// const uid = "M3JPrFRH6Fdo8XMUbF0l2zVZUCH3";
+	// const isAdmin = true;
 
 	const targetUser = data.targetUser;
 	const adminState = data.adminState;
@@ -434,12 +456,12 @@ exports.setAdmin = functions.https.onCall(async (data, context) => {
  * @return {promise} The promise from setting the group's updated data.
 */
 exports.addSetToGroup = functions.https.onCall((data, context) => {
-	// const uid = context.auth.uid;
-	// const isAdmin = context.auth.token.admin;
-	// const auth = context.auth;
-	const uid = "user_01";
-	const isAdmin = false;
-	const auth = { uid: uid };
+	const uid = context.auth.uid;
+	const isAdmin = context.auth.token.admin;
+	const auth = context.auth;
+	// const uid = "user_01";
+	// const isAdmin = false;
+	// const auth = { uid: uid };
 
 	const groupId = data.groupId;
 	const setId = data.setId;
@@ -493,12 +515,12 @@ exports.addSetToGroup = functions.https.onCall((data, context) => {
  * @return {promise} The promise from setting the group's updated data.
 */
 exports.removeSetFromGroup = functions.https.onCall((data, context) => {
-	// const uid = context.auth.uid;
-	// const isAdmin = context.auth.token.admin;
-	// const auth = context.auth;
-	const uid = "user_01";
-	const isAdmin = false;
-	const auth = { uid: uid };
+	const uid = context.auth.uid;
+	const isAdmin = context.auth.token.admin;
+	const auth = context.auth;
+	// const uid = "user_01";
+	// const isAdmin = false;
+	// const auth = { uid: uid };
 
 	const groupId = data.groupId;
 	const setId = data.setId;
@@ -591,8 +613,8 @@ async function generateJoinCode() {
  * @return {string} The ID of the new group's document in the groups collection.
 */
 exports.createGroup = functions.https.onCall(async (data, context) => {
-	// const uid = context.auth.uid;
-	const uid = "user_01";
+	const uid = context.auth.uid;
+	// const uid = "user_01";
 
 	const joinCode = await generateJoinCode();
 
diff --git a/test/functions.test.js b/test/functions.test.js
index ec5efc9..3a10b77 100644
--- a/test/functions.test.js
+++ b/test/functions.test.js
@@ -31,6 +31,12 @@ const groupOne = "group_01";
 const doubleDefinitionOne = "definition/01";
 const doubleDefinitionTwo = "definition/02";
 const punctuationDefinitionOne = "definition .,()-_'\"01";
+const progressVocabOne = userOne + "__" + vocabOne;
+const progressVocabTwo = userOne + "__" + vocabTwo;
+const vocabThree = "vocab_03";
+const vocabFour = "vocab_04";
+const progressVocabThree = userOne + "__" + vocabThree;
+const progressVocabFour = userOne + "__" + vocabFour;
 
 describe("Parandum Cloud Functions", () => {
 
@@ -73,7 +79,7 @@ describe("Parandum Cloud Functions", () => {
 
 		const requestData = {
 			switch_language: false,
-			set_id: setOne,
+			sets: [setOne],
 			mode: "questions",
 			limit: 2,
 		};
@@ -86,8 +92,8 @@ describe("Parandum Cloud Functions", () => {
 		});
 
 		hamjest.assertThat(snapAfter.questions, hamjest.anyOf(
-			hamjest.is(["vocab_01", "vocab_02"]),
-			hamjest.is(["vocab_02", "vocab_01"])
+			hamjest.is([progressVocabOne, progressVocabTwo]),
+			hamjest.is([progressVocabTwo, progressVocabOne])
 		));
 		assert.deepStrictEqual(snapAfter.correct, []);
 		assert.deepStrictEqual(snapAfter.incorrect, []);
@@ -98,7 +104,82 @@ describe("Parandum Cloud Functions", () => {
 		assert.notStrictEqual(snapAfter.start_time, null);
 		assert.strictEqual(snapAfter.switch_language, false);
 		assert.strictEqual(snapAfter.uid, userOne);
-		assert.strictEqual(snapAfter.set_owner, userOne);
+		assert.strictEqual(snapAfter.mode, "questions");
+	});
+
+	it("createProgress can create new questions mode progress file from multiple existing sets", async () => {
+		const createProgress = test.wrap(cloudFunctions.createProgress);
+
+		const setDataOne = {
+			"owner": userOne,
+			"public": false,
+			"title": setOne,
+		};
+		const vocabDataOne = {
+			"term": termOne,
+			"definition": definitionOne,
+			"sound": soundOne,
+		};
+		const vocabDataTwo = {
+			"term": termTwo,
+			"definition": definitionTwo,
+			"sound": soundTwo,
+		};
+		const setDataTwo = {
+			"owner": userOne,
+			"public": false,
+			"title": setTwo,
+		};
+		const vocabDataThree = {
+			"term": termOne,
+			"definition": definitionOne,
+			"sound": soundOne,
+		};
+		const vocabDataFour = {
+			"term": termTwo,
+			"definition": definitionTwo,
+			"sound": soundTwo,
+		};
+
+		await firestore.collection("sets").doc(setOne).set(setDataOne);
+		await firestore.collection("sets").doc(setOne)
+			.collection("vocab").doc(vocabOne).set(vocabDataOne);
+		await firestore.collection("sets").doc(setOne)
+			.collection("vocab").doc(vocabTwo).set(vocabDataTwo);
+		await firestore.collection("sets").doc(setTwo).set(setDataTwo);
+		await firestore.collection("sets").doc(setTwo)
+			.collection("vocab").doc(vocabOne).delete();
+		await firestore.collection("sets").doc(setTwo)
+			.collection("vocab").doc(vocabTwo).delete();
+		await firestore.collection("sets").doc(setTwo)
+			.collection("vocab").doc(vocabThree).set(vocabDataThree);
+		await firestore.collection("sets").doc(setTwo)
+			.collection("vocab").doc(vocabFour).set(vocabDataFour);
+
+		const requestData = {
+			switch_language: false,
+			sets: [setOne, setTwo],
+			mode: "questions",
+			limit: 4,
+		};
+
+		const progressId = await createProgress(requestData);
+		const progressDocId = firestore.collection("progress").doc(progressId);
+
+		const snapAfter = await progressDocId.get().then((doc) => {
+			return doc.data();
+		});
+
+		assert.deepStrictEqual(snapAfter.questions.sort(), [progressVocabOne, progressVocabTwo, progressVocabThree, progressVocabFour])
+		assert.deepStrictEqual(snapAfter.correct, []);
+		assert.deepStrictEqual(snapAfter.incorrect, []);
+		assert.deepStrictEqual(snapAfter.current_correct, []);
+		assert.strictEqual(snapAfter.duration, null);
+		assert.strictEqual(snapAfter.progress, 0);
+		assert.strictEqual(snapAfter.set_title, setOne + " & " + setTwo);
+		assert.notStrictEqual(snapAfter.start_time, null);
+		assert.strictEqual(snapAfter.switch_language, false);
+		assert.strictEqual(snapAfter.uid, userOne);
 		assert.strictEqual(snapAfter.mode, "questions");
 	});
 
@@ -129,7 +210,7 @@ describe("Parandum Cloud Functions", () => {
 
 		const requestData = {
 			switch_language: false,
-			set_id: setOne,
+			sets: [setOne],
 			mode: "lives",
 			limit: 2,
 		};
@@ -142,8 +223,8 @@ describe("Parandum Cloud Functions", () => {
 		});
 
 		hamjest.assertThat(snapAfter.questions, hamjest.anyOf(
-			hamjest.is(["vocab_01", "vocab_02"]),
-			hamjest.is(["vocab_02", "vocab_01"])
+			hamjest.is([progressVocabOne, progressVocabTwo]),
+			hamjest.is([progressVocabTwo, progressVocabOne])
 		));
 		assert.deepStrictEqual(snapAfter.correct, []);
 		assert.deepStrictEqual(snapAfter.incorrect, []);
@@ -154,7 +235,6 @@ describe("Parandum Cloud Functions", () => {
 		assert.notStrictEqual(snapAfter.start_time, null);
 		assert.strictEqual(snapAfter.switch_language, false);
 		assert.strictEqual(snapAfter.uid, userOne);
-		assert.strictEqual(snapAfter.set_owner, userOne);
 		assert.strictEqual(snapAfter.mode, "lives");
 		assert.strictEqual(snapAfter.lives, 2);
 	});
@@ -186,7 +266,7 @@ describe("Parandum Cloud Functions", () => {
 
 		const requestData = {
 			switch_language: false,
-			set_id: setOne,
+			sets: [setOne],
 			mode: "questions",
 			limit: 2,
 		};
@@ -221,7 +301,7 @@ describe("Parandum Cloud Functions", () => {
 
 		const requestData = {
 			switch_language: false,
-			set_id: setTwo,
+			sets: [setTwo],
 			mode: "questions",
 			limit: 2,
 		};
@@ -239,14 +319,13 @@ describe("Parandum Cloud Functions", () => {
 			incorrect: [],
 			progress: 0,
 			questions: [
-				vocabOne,
-				vocabTwo
+				progressVocabOne,
+				progressVocabTwo
 			],
 			set_title: setOne,
 			start_time: 1627308670962,
 			switch_language: false,
 			uid: userOne,
-			set_owner: userOne,
 			mode: "questions",
 		};
 		const termDataOne = {
@@ -268,13 +347,13 @@ describe("Parandum Cloud Functions", () => {
 		const progressDocId = firestore.collection("progress").doc(progressId);
 
 		await progressDocId.set(progressData);
-		await progressDocId.collection("terms").doc(vocabOne)
+		await progressDocId.collection("terms").doc(progressVocabOne)
 			.set(termDataOne);
-		await progressDocId.collection("terms").doc(vocabTwo)
+		await progressDocId.collection("terms").doc(progressVocabTwo)
 			.set(termDataTwo);
-		await progressDocId.collection("definitions").doc(vocabOne)
+		await progressDocId.collection("definitions").doc(progressVocabOne)
 			.set(definitionDataOne);
-		await progressDocId.collection("definitions").doc(vocabTwo)
+		await progressDocId.collection("definitions").doc(progressVocabTwo)
 			.set(definitionDataTwo);
 
 		const firstTermAnswerRequestData = {
@@ -297,6 +376,7 @@ describe("Parandum Cloud Functions", () => {
 				nextPrompt: {
 					item: termOne,
 					sound: soundOne,
+					set_owner: userOne,
 				},
 				progress: 1,
 				totalQuestions: 3,
@@ -311,6 +391,7 @@ describe("Parandum Cloud Functions", () => {
 				nextPrompt: {
 					item: termTwo,
 					sound: soundTwo,
+					set_owner: userOne,
 				},
 				progress: 1,
 				totalQuestions: 3,
@@ -328,36 +409,34 @@ describe("Parandum Cloud Functions", () => {
 				correct: [],
 				current_correct: [],
 				duration: null,
-				incorrect: [vocabOne],
+				incorrect: [progressVocabOne],
 				progress: 1,
 				questions: [
-					vocabOne,
-					vocabOne,
-					vocabTwo
+					progressVocabOne,
+					progressVocabOne,
+					progressVocabTwo
 				],
 				set_title: setOne,
 				start_time: 1627308670962,
 				switch_language: false,
 				uid: userOne,
-				set_owner: userOne,
 				mode: "questions",
 			}),
 			hamjest.is({
 				correct: [],
 				current_correct: [],
 				duration: null,
-				incorrect: [vocabOne],
+				incorrect: [progressVocabOne],
 				progress: 1,
 				questions: [
-					vocabOne,
-					vocabTwo,
-					vocabOne
+					progressVocabOne,
+					progressVocabTwo,
+					progressVocabOne
 				],
 				set_title: setOne,
 				start_time: 1627308670962,
 				switch_language: false,
 				uid: userOne,
-				set_owner: userOne,
 				mode: "questions",
 			})
 		));
@@ -375,14 +454,14 @@ describe("Parandum Cloud Functions", () => {
 		});
 
 		hamjest.assertThat(snapAfterCorrectData.correct, hamjest.anyOf(
-			hamjest.is(["vocab_01", "vocab_02"]),
-			hamjest.is(["vocab_02", "vocab_01"])
+			hamjest.is([progressVocabOne, progressVocabTwo]),
+			hamjest.is([progressVocabTwo, progressVocabOne])
 		));
 		hamjest.assertThat(snapAfterCorrectData.questions, hamjest.anyOf(
-			hamjest.is(["vocab_01", "vocab_01", "vocab_02"]),
-			hamjest.is(["vocab_01", "vocab_02", "vocab_01"])
+			hamjest.is([progressVocabOne, progressVocabOne, progressVocabTwo]),
+			hamjest.is([progressVocabOne, progressVocabTwo, progressVocabOne])
 		));
-		assert.deepStrictEqual(snapAfterCorrectData.incorrect, [vocabOne]);
+		assert.deepStrictEqual(snapAfterCorrectData.incorrect, [progressVocabOne]);
 		assert.deepStrictEqual(snapAfterCorrectData.current_correct, []);
 		assert.notStrictEqual(snapAfterCorrectData.duration, null);
 		assert.strictEqual(snapAfterCorrectData.progress, 3);
@@ -390,7 +469,6 @@ describe("Parandum Cloud Functions", () => {
 		assert.strictEqual(snapAfterCorrectData.start_time, 1627308670962);
 		assert.strictEqual(snapAfterCorrectData.switch_language, false);
 		assert.strictEqual(snapAfterCorrectData.uid, userOne);
-		assert.strictEqual(snapAfterCorrectData.set_owner, userOne);
 		assert.strictEqual(snapAfterCorrectData.mode, "questions");
 	});
 
@@ -404,14 +482,13 @@ describe("Parandum Cloud Functions", () => {
 			current_correct: [],
 			progress: 0,
 			questions: [
-				vocabOne,
-				vocabTwo
+				progressVocabOne,
+				progressVocabTwo
 			],
 			set_title: setOne,
 			start_time: 1627308670962,
 			switch_language: false,
 			uid: userOne,
-			set_owner: userOne,
 			mode: "questions",
 		};
 		const termDataOne = {
@@ -433,13 +510,13 @@ describe("Parandum Cloud Functions", () => {
 		const progressDocId = firestore.collection("progress").doc(progressId);
 
 		await progressDocId.set(progressData);
-		await progressDocId.collection("terms").doc(vocabOne)
+		await progressDocId.collection("terms").doc(progressVocabOne)
 			.set(termDataOne);
-		await progressDocId.collection("terms").doc(vocabTwo)
+		await progressDocId.collection("terms").doc(progressVocabTwo)
 			.set(termDataTwo);
-		await progressDocId.collection("definitions").doc(vocabOne)
+		await progressDocId.collection("definitions").doc(progressVocabOne)
 			.set(definitionDataOne);
-		await progressDocId.collection("definitions").doc(vocabTwo)
+		await progressDocId.collection("definitions").doc(progressVocabTwo)
 			.set(definitionDataTwo);
 
 		const firstTermAnswerOneRequestData = {
@@ -484,14 +561,13 @@ describe("Parandum Cloud Functions", () => {
 			incorrect: [],
 			progress: 0,
 			questions: [
-				vocabOne,
-				vocabTwo
+				progressVocabOne,
+				progressVocabTwo
 			],
 			set_title: setOne,
 			start_time: 1627308670962,
 			switch_language: false,
 			uid: userOne,
-			set_owner: userOne,
 			mode: "questions",
 		});
 
@@ -506,36 +582,34 @@ describe("Parandum Cloud Functions", () => {
 				correct: [],
 				current_correct: [],
 				duration: null,
-				incorrect: [vocabOne],
+				incorrect: [progressVocabOne],
 				progress: 1,
 				questions: [
-					vocabOne,
-					vocabOne,
-					vocabTwo
+					progressVocabOne,
+					progressVocabOne,
+					progressVocabTwo
 				],
 				set_title: setOne,
 				start_time: 1627308670962,
 				switch_language: false,
 				uid: userOne,
-				set_owner: userOne,
 				mode: "questions",
 			}),
 			hamjest.is({
 				correct: [],
 				current_correct: [],
 				duration: null,
-				incorrect: [vocabOne],
+				incorrect: [progressVocabOne],
 				progress: 1,
 				questions: [
-					vocabOne,
-					vocabTwo,
-					vocabOne
+					progressVocabOne,
+					progressVocabTwo,
+					progressVocabOne
 				],
 				set_title: setOne,
 				start_time: 1627308670962,
 				switch_language: false,
 				uid: userOne,
-				set_owner: userOne,
 				mode: "questions",
 			})
 		));
@@ -557,14 +631,14 @@ describe("Parandum Cloud Functions", () => {
 		});
 
 		hamjest.assertThat(snapAfterCorrectData.correct, hamjest.anyOf(
-			hamjest.is(["vocab_01", "vocab_02"]),
-			hamjest.is(["vocab_02", "vocab_01"])
+			hamjest.is([progressVocabOne, progressVocabTwo]),
+			hamjest.is([progressVocabTwo, progressVocabOne])
 		));
 		hamjest.assertThat(snapAfterCorrectData.questions, hamjest.anyOf(
-			hamjest.is(["vocab_01", "vocab_01", "vocab_02"]),
-			hamjest.is(["vocab_01", "vocab_02", "vocab_01"])
+			hamjest.is([progressVocabOne, progressVocabOne, progressVocabTwo]),
+			hamjest.is([progressVocabOne, progressVocabTwo, progressVocabOne])
 		));
-		assert.deepStrictEqual(snapAfterCorrectData.incorrect, [vocabOne]);
+		assert.deepStrictEqual(snapAfterCorrectData.incorrect, [progressVocabOne]);
 		assert.deepStrictEqual(snapAfterCorrectData.current_correct, []);
 		assert.notStrictEqual(snapAfterCorrectData.duration, null);
 		assert.strictEqual(snapAfterCorrectData.progress, 3);
@@ -572,7 +646,6 @@ describe("Parandum Cloud Functions", () => {
 		assert.strictEqual(snapAfterCorrectData.start_time, 1627308670962);
 		assert.strictEqual(snapAfterCorrectData.switch_language, false);
 		assert.strictEqual(snapAfterCorrectData.uid, userOne);
-		assert.strictEqual(snapAfterCorrectData.set_owner, userOne);
 		assert.strictEqual(snapAfterCorrectData.mode, "questions");
 	}).timeout(5000);
 
@@ -586,14 +659,13 @@ describe("Parandum Cloud Functions", () => {
 			incorrect: [],
 			progress: 0,
 			questions: [
-				vocabOne,
-				vocabTwo
+				progressVocabOne,
+				progressVocabTwo
 			],
 			set_title: setOne,
 			start_time: 1627308670962,
 			switch_language: false,
 			uid: userOne,
-			set_owner: userOne,
 			mode: "questions",
 		};
 		const termDataOne = {
@@ -615,13 +687,13 @@ describe("Parandum Cloud Functions", () => {
 		const progressDocId = firestore.collection("progress").doc(progressId);
 
 		await progressDocId.set(progressData);
-		await progressDocId.collection("terms").doc(vocabOne)
+		await progressDocId.collection("terms").doc(progressVocabOne)
 			.set(termDataOne);
-		await progressDocId.collection("terms").doc(vocabTwo)
+		await progressDocId.collection("terms").doc(progressVocabTwo)
 			.set(termDataTwo);
-		await progressDocId.collection("definitions").doc(vocabOne)
+		await progressDocId.collection("definitions").doc(progressVocabOne)
 			.set(definitionDataOne);
-		await progressDocId.collection("definitions").doc(vocabTwo)
+		await progressDocId.collection("definitions").doc(progressVocabTwo)
 			.set(definitionDataTwo);
 
 		const requestData = {