Users with the module WebPurchasing, can create requisitions which can be generated into Purchase Orders. In WebPurchasing, we have the ability to add a one time product as a flat rate item. When the requisition is approved and then generated into a purchase order in Accounts Payable, the line item on the purchase order can be receipted. But when we create the receipt for these line items for the one time product as a flat rate item, it does not pull in the correct amount that shows on the requisition and on the purchase order.
We are currently evaluating this issue and will update this article when we have more information.