diff --git a/packages/backend/src/core/RedisTimelineService.ts b/packages/backend/src/core/RedisTimelineService.ts
index f0ca2726d6..2f110c014e 100644
--- a/packages/backend/src/core/RedisTimelineService.ts
+++ b/packages/backend/src/core/RedisTimelineService.ts
@@ -44,16 +44,16 @@ export class RedisTimelineService {
 	public get(name: string, untilId?: string | null, sinceId?: string | null) {
 		if (untilId && sinceId) {
 			return this.redisForTimelines.lrange('list:' + name, 0, -1)
-				.then(ids => ids.filter(id => id > untilId && id < sinceId).sort((a, b) => a > b ? -1 : 1));
+				.then(ids => ids.filter(id => id < untilId && id > sinceId).sort((a, b) => a > b ? -1 : 1));
 		} else if (untilId) {
 			return this.redisForTimelines.lrange('list:' + name, 0, -1)
-				.then(ids => ids.filter(id => id > untilId).sort((a, b) => a > b ? -1 : 1));
+				.then(ids => ids.filter(id => id < untilId).sort((a, b) => a > b ? -1 : 1));
 		} else if (sinceId) {
 			return this.redisForTimelines.lrange('list:' + name, 0, -1)
-				.then(ids => ids.filter(id => id < sinceId).sort((a, b) => a < b ? -1 : 1));
+				.then(ids => ids.filter(id => id > sinceId).sort((a, b) => a < b ? -1 : 1));
 		} else {
 			return this.redisForTimelines.lrange('list:' + name, 0, -1)
-				.then(ids => ids.sort((a, b) => a > b ? -1 : 1));
+				.then(ids => ids.sort((a, b) => a < b ? -1 : 1));
 		}
 	}
 
@@ -68,12 +68,12 @@ export class RedisTimelineService {
 			const tls = res.map(r => r[1] as string[]);
 			return tls.map(ids =>
 				(untilId && sinceId)
-					? ids.filter(id => id > untilId && id < sinceId).sort((a, b) => a > b ? -1 : 1)
+					? ids.filter(id => id < untilId && id > sinceId).sort((a, b) => a > b ? -1 : 1)
 					: untilId
-						? ids.filter(id => id > untilId).sort((a, b) => a > b ? -1 : 1)
+						? ids.filter(id => id < untilId).sort((a, b) => a > b ? -1 : 1)
 						: sinceId
-							? ids.filter(id => id < sinceId).sort((a, b) => a < b ? -1 : 1)
-							: ids.sort((a, b) => a > b ? -1 : 1),
+							? ids.filter(id => id > sinceId).sort((a, b) => a < b ? -1 : 1)
+							: ids.sort((a, b) => a < b ? -1 : 1),
 			);
 		});
 	}
diff --git a/packages/backend/src/server/api/endpoints/antennas/notes.ts b/packages/backend/src/server/api/endpoints/antennas/notes.ts
index 7d6841563a..1a78bf26df 100644
--- a/packages/backend/src/server/api/endpoints/antennas/notes.ts
+++ b/packages/backend/src/server/api/endpoints/antennas/notes.ts
@@ -73,8 +73,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private redisTimelineService: RedisTimelineService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const untilId = ps.untilId ?? ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null;
-			const sinceId = ps.sinceId ?? ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null;
+			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null);
+			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null);
 
 			const antenna = await this.antennasRepository.findOneBy({
 				id: ps.antennaId,
diff --git a/packages/backend/src/server/api/endpoints/channels/timeline.ts b/packages/backend/src/server/api/endpoints/channels/timeline.ts
index e063e0e2fc..4385c698eb 100644
--- a/packages/backend/src/server/api/endpoints/channels/timeline.ts
+++ b/packages/backend/src/server/api/endpoints/channels/timeline.ts
@@ -74,8 +74,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private activeUsersChart: ActiveUsersChart,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const untilId = ps.untilId ?? ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null;
-			const sinceId = ps.sinceId ?? ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null;
+			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null);
+			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null);
 			const isRangeSpecified = untilId != null && sinceId != null;
 
 			const channel = await this.channelsRepository.findOneBy({
diff --git a/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
index a05269794c..1b77285d47 100644
--- a/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts
@@ -76,8 +76,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private redisTimelineService: RedisTimelineService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const untilId = ps.untilId ?? ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null;
-			const sinceId = ps.sinceId ?? ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null;
+			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null);
+			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null);
 
 			const policies = await this.roleService.getUserPolicies(me.id);
 			if (!policies.ltlAvailable) {
diff --git a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
index c8ea003ba6..2357f32d5e 100644
--- a/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/local-timeline.ts
@@ -72,8 +72,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private redisTimelineService: RedisTimelineService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const untilId = ps.untilId ?? ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null;
-			const sinceId = ps.sinceId ?? ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null;
+			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null);
+			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null);
 
 			const policies = await this.roleService.getUserPolicies(me ? me.id : null);
 			if (!policies.ltlAvailable) {
diff --git a/packages/backend/src/server/api/endpoints/notes/timeline.ts b/packages/backend/src/server/api/endpoints/notes/timeline.ts
index cd45135f99..760d52c9db 100644
--- a/packages/backend/src/server/api/endpoints/notes/timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/timeline.ts
@@ -66,8 +66,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private redisTimelineService: RedisTimelineService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const untilId = ps.untilId ?? ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null;
-			const sinceId = ps.sinceId ?? ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null;
+			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null);
+			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null);
 
 			const [
 				followings,
diff --git a/packages/backend/src/server/api/endpoints/notes/user-list-timeline.ts b/packages/backend/src/server/api/endpoints/notes/user-list-timeline.ts
index 96c8ff5b1b..f7ee58264e 100644
--- a/packages/backend/src/server/api/endpoints/notes/user-list-timeline.ts
+++ b/packages/backend/src/server/api/endpoints/notes/user-list-timeline.ts
@@ -83,8 +83,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private redisTimelineService: RedisTimelineService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const untilId = ps.untilId ?? ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null;
-			const sinceId = ps.sinceId ?? ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null;
+			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null);
+			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null);
 
 			const list = await this.userListsRepository.findOneBy({
 				id: ps.listId,
diff --git a/packages/backend/src/server/api/endpoints/roles/notes.ts b/packages/backend/src/server/api/endpoints/roles/notes.ts
index 366c3a7cc1..0db51abc55 100644
--- a/packages/backend/src/server/api/endpoints/roles/notes.ts
+++ b/packages/backend/src/server/api/endpoints/roles/notes.ts
@@ -69,8 +69,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private redisTimelineService: RedisTimelineService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const untilId = ps.untilId ?? ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null;
-			const sinceId = ps.sinceId ?? ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null;
+			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null);
+			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null);
 
 			const role = await this.rolesRepository.findOneBy({
 				id: ps.roleId,
diff --git a/packages/backend/src/server/api/endpoints/users/notes.ts b/packages/backend/src/server/api/endpoints/users/notes.ts
index 30cd5b791f..d2a65142a5 100644
--- a/packages/backend/src/server/api/endpoints/users/notes.ts
+++ b/packages/backend/src/server/api/endpoints/users/notes.ts
@@ -74,8 +74,8 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private redisTimelineService: RedisTimelineService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
-			const untilId = ps.untilId ?? ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null;
-			const sinceId = ps.sinceId ?? ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null;
+			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.genId(new Date(ps.untilDate!)) : null);
+			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.genId(new Date(ps.sinceDate!)) : null);
 			const isRangeSpecified = untilId != null && sinceId != null;
 
 			if (isRangeSpecified || sinceId == null) {