Net Pay is getting cumulated and /566 wage type is generated

Hi,

We ran July payroll for an employee (joining date 28th July) and the system rightly calculated his net pay.

While running the Aug payroll, net pay being Rs. 8961, the system generated an additional technical wage type /565 i.e. Carry over for next month i.e. Rs. 8961.

In september, system generated another technical wage type /566 i.e. Carry over from previous period and the net pay was incorrectly calculated as 16987 i.e. Net pay of sep - Rs 8026 and net pay of aug i.e. 8961.

Can anyone tell me why, the system is cumulating his net pay and /565 /566 wage types are generated?

Ally.