Additonal payments infotype process in Arrear deductions

Hi Everybody,

Could somebody clarify me how additional payments (0015) infotype works in arrears processing?

We recently changed our Arrears priority according to our requirement.

Wage type Priority Arrears

401k A 3

5000 C 3

5010 D 3

While testing we made an addition payment $10 for WT 5010 (Dental) and see that the payroll process deducted this dollar amount from WT 5000, which was supposed to be deducted from WT 5010.

My question is it that does SAP identifies both Arrears priority and Additional

payment wage type together. In my case either of one is happening.

Could somebody tell me how it is works or did i miss configuration steps.

Thank you,

Mamatha