Why do attachments included in the Supplier record appear on the receipt transaction?

We are live with Rel12.1.3 of EBS, using Encumbrance Accounting.

We have included 5 attachments on the Organization page of the supplier record.  These 5 attachments correspond to the 5 types, From Supplier, To Supplier, To Buyer, To Receiver, and Miscellaneous.  When we view previously recorded receipt or enter new receipts for this supplier, in the iProcurement module, these supplier attachments appear.  Our supplier attachments should not appear on the receipt records.