RE: PO receipt with foreing currency, create AP VO in Base Currency
If you are logged into a company the PO will be created in that company's base currency, you don't have an option to change that.
So then the Receipt is the only place that you can designate currency different from the company you are logged in as.
If you don't change the currency via the receipt screen(it won't allow you to), the VO document will be created based on the receipt currency if you opt to auto create for sure.
if it is not auto created, then you would have to chose the PO in the vouchers screen.
Do you have multiple companies that have different Base currencies?
Do you auto create the voucher from receipt?
Is it possible that someone changed the currency in Voucher and Adjustment screen by accident?