receipting orders and pending change requests

Instead of receipting orders correctly, A user has been putting in the delivery receipts from the supplier as change requests on the quantity ordered.

The PO status is approved but we are unable to edit the requisition as no more amendments can be made on the order apparently due to pending change requests.

When looking through the workflow, the request to change has been approved by the Buyer, but the system is stuck.

So the change is processed by the system, and seems to be applied but the requisition is still in a pending state, unable to have changes applied to it.