Due Date is not being calculated correctly
I am getting some weird behaviour of SAP in calculating due date on purchase invoice. I have checked payment terms which is responsible to calculate it however nothing seem to giving correct input. I am getting this weird calculation for only 2 suppliers however for rest of the suppliers, if I use same payment terms then SAP calculate due date correctly. I checked holidays as well (Does it affect in calculation of due date?).
I am using SAP 9.0 Pl 06.
Let me know if you require any input. Any help would appreciated.