Issue auto populating from PO to Invoice

SUGGESTED

We are having an issue with our auto populating the correct columns for only two of the columns - all the other columns auto populate correctly, from our PO's into our Invoicing. For example, in our PO we have Item No., Qty, Description, Unit Price, Unit, Amount. When I go into our subcontract invoicing and I enter the PO number, it auto populates the information from our purchase order. However, the quantity from the purchase order populates into our price column in our invoice, and the price from our purchase order populates into our quantity column in our invoice. 

I don't know the backend too well but wondering is there a possibility that they are linked incorrectly? If so, how do I resolve this? 

Thanks,
Spencer