PO's Received but Not Invoiced

Can anyone tell me how to clear items out of this report that are mistakes.
This report is suppose to be the detail of the A/P Clearing account in the
G/L. When I ran this report I found open items that have been paid as a
miscellaneous invoice and not matched with the packing slip. The P.O. is
closed and the Packing Slip is closed and when I go to invoice entry to
match up with receiver it is not there. Epicor has been of no help as
usual, they are referring it up to program control.