We have customers who use various purchase order numbers, and we would like to be able to quickly identify which invoice is associated to their PO. While we record this information on the invoices, they use their reference numbers (Purchase Order / Sales Order / Reference #) when sending in payments, and it SHOULD be easily found next to the invoice number on the "record payment" page versus having to go back and look for their invoice to find the associated PO to record the payment. Anybody else have this issue?