Bruce:
We have run across this as well. A couple of solutions that are missing from Adagio, either one would solve this problem:
1. EFT tab to have an option to use the Payee tab for the payment address (or even better if it sees that a payee address exists then use that address.
2. Payables and PO to have a default ship to address, similar to what AR and OE has. This would be very useful for all users of AP & PO.