I clock in/out normally but absence is displayed in the calculated statistics.?

Please check
1) The timetable. Please make sure that your clock in/out is within the time range. For instance, Begin Clock-Out Time is 17: 00 and End Clock-out Time is 18:00 set in the timetable. If your time attendance record is 16:30, this record will be regarded as invalid record and the system will consider the absence in the afternoon.
2) Must C-in(Clock-in) and Must C-out(Clock-out) is selected. If yes, missing of either clock-in or clock-out will cause absence displayed in the statistics.
3) The time of the unit is correct or not.