Purchase Order - Item was "Over Invoiced"

SOLVED

Hello,

For one PO we received two different invoices since products were shipped separately. For a line that was for the sales tax, it was used twice when receiving the two invoices instead of a second line being created for the second invoice's sales tax. Since one line was used twice, the Open PO Report is now saying that the item was "Over Invoiced" and can't be updated to Completed. The report says that 1 unit was ordered, 1 unit received, but 2 units invoiced. 

The invoice has already been paid so I can't reverse it without recalling the check. What is the solution so that I can close out this PO?

Thanks in advance!