[Leave] Why are the days of leave applied by the employee counted not as expected?

The leave rule allows you to set up either [Calendar Days] or [Working Days] as the types of days for the leave.

If you want to exclude rest days when employees apply for leaves, you should set up the leave rule with [Working Days]. If it should be included, [Calendar Days].

Example:

An employee applies for leaves that start on Friday and end on the next Monday. The system deduct 4 days, Sat and Sun included, from the employee leave balance. 

If Sat and Sun should be excluded in the above case, [Working Days] will be the proper setup for that leave.