Can voucher entry & voucher match be setup to always use current vendor payment terms?

We are on E1 9.1.  Wondering if it is possible to setup voucher entry and voucher match to always use the current vendor payment terms instead of terms on PO/Receipt since the terms for the vendor may have changed (and there is no process to update open POs/Receipts with new terms)?  Many of our vouchers are generated via voucher match and then a manual entry is added for freight or other charges not on the PO - these newly added charges get the current terms and thus we get vouchers with multiple pay items with different payment terms - thus