diff --git a/apps/server/src/attendance/attendance.service.ts b/apps/server/src/attendance/attendance.service.ts
index 3218b81..e1d27b2 100644
--- a/apps/server/src/attendance/attendance.service.ts
+++ b/apps/server/src/attendance/attendance.service.ts
@@ -866,9 +866,13 @@ export class AttendanceService {
       };
     }).sort((left, right) => left.sortOrder - right.sortOrder);
 
-    for (let index = 1; index < normalized.length; index += 1) {
-      const previous = normalized[index - 1];
-      const current = normalized[index];
+    // 按开始时间排序后再检查重叠，避免 sortOrder 与时间顺序不一致时漏检
+    const sortedByTime = [...normalized].sort(
+      (left, right) => this.toMinutes(left.startTime) - this.toMinutes(right.startTime),
+    );
+    for (let index = 1; index < sortedByTime.length; index += 1) {
+      const previous = sortedByTime[index - 1];
+      const current = sortedByTime[index];
       if (previous.enabled && current.enabled && this.toMinutes(current.startTime) < this.toMinutes(previous.endTime)) {
         throw new BadRequestException(`${previous.label} 和 ${current.label} 时间段不能重叠`);
       }
@@ -996,10 +1000,10 @@ export class AttendanceService {
       ]),
     );
 
-    return entities.map((schedule, index) => {
+    return entities.map((schedule) => {
       const teacher = teacherByScheduleId.get(schedule.id) ?? {
-        teacherName: raw[index]?.teacherName || null,
-        teacherUsername: raw[index]?.teacherUsername || null,
+        teacherName: null,
+        teacherUsername: null,
       };
       return { ...schedule, ...teacher };
     });
diff --git a/apps/server/src/expenses/expenses.service.ts b/apps/server/src/expenses/expenses.service.ts
index d818e33..efa1e38 100644
--- a/apps/server/src/expenses/expenses.service.ts
+++ b/apps/server/src/expenses/expenses.service.ts
@@ -291,6 +291,11 @@ export class ExpensesService {
           skipped++;
           continue;
         }
+        if (!this.isValidDate(periodStart) || !this.isValidDate(periodEnd) || periodEnd < periodStart) {
+          errors.push(`第${rowNum}行: ${row.roomNumber} 账期无效（${periodStart} ~ ${periodEnd}），已跳过`);
+          skipped++;
+          continue;
+        }
 
         // 关键校验：电费 + 水费 都为 0 时，多半是 Excel 公式未正确计算或字段缺失，
         // 必须给出明确错误，避免出现"提示成功但无数据"的迷之现象。
@@ -439,6 +444,15 @@ export class ExpensesService {
           }
         }
 
+        // 校验金额
+        try {
+          this.assertPositiveAmount(row.amount);
+        } catch (e: any) {
+          errors.push(`第${rowNum}行: ${row.studentName} ${e.message}`);
+          skipped++;
+          continue;
+        }
+
         await this.personalExpRepo.save(
           this.personalExpRepo.create({
             studentId: student.id,
diff --git a/apps/server/src/occupancies/occupancies.service.ts b/apps/server/src/occupancies/occupancies.service.ts
index 496aebb..5ff0881 100644
--- a/apps/server/src/occupancies/occupancies.service.ts
+++ b/apps/server/src/occupancies/occupancies.service.ts
@@ -82,7 +82,7 @@ export class OccupanciesService {
       const count = await manager.count(Occupancy, {
         where: { roomId: dto.roomId, checkOutDate: IsNull() },
       });
-      if (count >= room.capacity) throw new BadRequestException('宿舍已满');
+      if (count >= (room.capacity ?? 0)) throw new BadRequestException('宿舍已满');
       const student = await manager.findOne(Student, { where: { id: dto.studentId } });
       if (!student) throw new NotFoundException('学生不存在');
 
@@ -124,8 +124,7 @@ export class OccupanciesService {
       );
       if (dto.bedId) await manager.update(Bed, dto.bedId, { status: 'occupied' });
       if (dto.lockerId) await manager.update(Locker, dto.lockerId, { status: 'occupied' });
-      if (count + 1 >= room.capacity) await manager.update(Room, room.id, { status: 'full' });
-
+      if (count + 1 >= (room.capacity ?? 0)) await manager.update(Room, room.id, { status: 'full' });
       if (dto.collectDeposit) {
         let deposit = await manager.findOne(Deposit, { where: { studentId: dto.studentId } });
         if (deposit) {
@@ -225,7 +224,7 @@ export class OccupanciesService {
       const count = await runner.manager.count(Occupancy, {
         where: { roomId: dto.newRoomId, checkOutDate: IsNull() },
       });
-      if (count >= newRoom.capacity) throw new BadRequestException('目标宿舍已满');
+      if (count >= (newRoom.capacity ?? 0)) throw new BadRequestException('目标宿舍已满');
 
       // 新床位校验
       if (dto.newBedId) {
@@ -286,7 +285,7 @@ export class OccupanciesService {
         await runner.manager.update(Locker, dto.newLockerId, { status: 'occupied' });
       }
 
-      if (count + 1 >= newRoom.capacity) {
+      if (count + 1 >= (newRoom.capacity ?? 0)) {
         await runner.manager.update(Room, newRoom.id, { status: 'full' });
       }
 
@@ -556,9 +555,9 @@ export class OccupanciesService {
 
           // 4. 检查宿舍容量
           const count = await occupancyRepo.count({ where: { roomId: room.id, checkOutDate: IsNull() } });
-          if (!isHistoricalRecord && count >= room.capacity) {
+          if (!isHistoricalRecord && count >= (room.capacity ?? 0)) {
             throw new ImportRowSkipped(
-              `第${rowNum}行: 宿舍 ${row.roomNumber} 已满（${count}/${room.capacity}），跳过 ${row.name}`,
+              `第${rowNum}行: 宿舍 ${row.roomNumber} 已满（${count}/${room.capacity ?? '?'}），跳过 ${row.name}`,
             );
           }
 
@@ -569,9 +568,9 @@ export class OccupanciesService {
             bed = await bedRepo.findOne({ where: { roomId: room.id, bedNumber } });
             if (!bed) {
               const existingBedCount = await bedRepo.count({ where: { roomId: room.id } });
-              if (existingBedCount >= room.capacity) {
+              if (existingBedCount >= (room.capacity ?? 0)) {
                 throw new BadRequestException(
-                  `宿舍 ${room.roomNumber} 已有 ${existingBedCount} 张床位，不能超过额定人数 ${room.capacity}`,
+                  `宿舍 ${room.roomNumber} 已有 ${existingBedCount} 张床位，不能超过额定人数 ${room.capacity ?? '?'}`,
                 );
               }
               bed = await bedRepo.save(
@@ -620,7 +619,7 @@ export class OccupanciesService {
           if (!isHistoricalRecord) {
             if (bed) await bedRepo.update(bed.id, { status: 'occupied' });
             if (locker) await lockerRepo.update(locker.id, { status: 'occupied' });
-            if (count + 1 >= room.capacity) {
+            if (count + 1 >= (room.capacity ?? 0)) {
               await roomRepo.update(room.id, { status: 'full' });
             }
           }
diff --git a/apps/server/src/rooms/rooms.controller.ts b/apps/server/src/rooms/rooms.controller.ts
index 8d10c92..88ff447 100644
--- a/apps/server/src/rooms/rooms.controller.ts
+++ b/apps/server/src/rooms/rooms.controller.ts
@@ -349,7 +349,7 @@ export class RoomsController {
       rows.push({
         roomNumber: String(row.getCell(1).value || ''),
         building: String(row.getCell(2).value || '') || undefined,
-        floor: Number(row.getCell(3).value) || undefined,
+        floor: (n => Number.isNaN(n) ? undefined : n)(Number(row.getCell(3).value)),
         capacity: Number(row.getCell(4).value) || 4,
         roomType: String(row.getCell(5).value || '').trim() || undefined,
         rentalCategory,
diff --git a/apps/server/src/rooms/rooms.service.ts b/apps/server/src/rooms/rooms.service.ts
index ba4c63c..896848c 100644
--- a/apps/server/src/rooms/rooms.service.ts
+++ b/apps/server/src/rooms/rooms.service.ts
@@ -50,7 +50,8 @@ export class RoomsService {
     if (familyMatch) {
       const bldg = `${familyMatch[1]}-${familyMatch[2]}栋`;
       const roomPart = familyMatch[3];
-      const floor = parseInt(roomPart.charAt(0), 10) || undefined;
+      const rawFloor = parseInt(roomPart.charAt(0), 10);
+      const floor = Number.isNaN(rawFloor) ? undefined : rawFloor;
       return { building: bldg, floor, roomType: '家庭房', capacity: 4 };
     }
     // 标准: X-YZZ 格式
@@ -58,7 +59,8 @@ export class RoomsService {
     if (stdMatch) {
       const bldgNum = stdMatch[1];
       const roomPart = stdMatch[2];
-      const floor = parseInt(roomPart.charAt(0), 10) || undefined;
+      const rawFloor = parseInt(roomPart.charAt(0), 10);
+      const floor = Number.isNaN(rawFloor) ? undefined : rawFloor;
       const building = `${bldgNum}号楼`;
       let roomType = '四人间';
       let capacity = 4;
@@ -71,7 +73,7 @@ export class RoomsService {
       }
       return { building, floor, roomType, capacity };
     }
-    return {};
+    return { capacity: 4, roomType: '四人间' };
   }
 
   async findAll(query?: { building?: string; includeArchived?: boolean }) {
@@ -374,7 +376,7 @@ export class RoomsService {
           roomNumber: row.roomNumber.trim(),
           building: row.building?.trim() || parsed.building || undefined,
           floor: row.floor ?? parsed.floor,
-          capacity: row.capacity || parsed.capacity || 4,
+          capacity: row.capacity ?? parsed.capacity ?? 4,
           roomType: row.roomType || parsed.roomType || undefined,
           rentalCategory: row.rentalCategory || undefined,
           monthlyRate: row.monthlyRate ?? undefined,
diff --git a/apps/server/src/schedules/schedules.service.ts b/apps/server/src/schedules/schedules.service.ts
index 57217e5..d89a8ff 100644
--- a/apps/server/src/schedules/schedules.service.ts
+++ b/apps/server/src/schedules/schedules.service.ts
@@ -198,6 +198,9 @@ export class SchedulesService {
     if (startTime === endTime) {
       throw new BadRequestException('上课时间和下课时间不能相同');
     }
+    if (startTime > endTime) {
+      throw new BadRequestException('上课时间不能晚于下课时间');
+    }
     if (startDate > endDate) {
       throw new BadRequestException('排课结束日期不能早于开始日期');
     }