Calculation problem in customer wagetype

Hi . I have a problem. I created a new wage type . Copied from basic pay(wage type 1000)

and created new data in INFO TYPE 0014.

But when i run payroll it does not calculate correct.

Employee who have problem has been assigned to new position in the middle of the month (09.03.2016).

In March there is 17 working days. But payroll calculate wage type only after 09.03.2016(12 working days).

How i can solve this problem ?