We are using App9

Notice that Payment Term of the Supplier Invoice for Charges attached to PO is fetching from the PO. In our opinion this is not correct because the charge supplier can be a different supplier in that it should come from Supplier master of charge supplier. 

Does anyone else is has face this issue.

note: sorry for posting this in incorrect subforum. Due to some reason I cannot see product related forums, which I could see before.