Voucher Match Multiple Supplier

Hey team,

I am trying to figure out how to match multiple suppliers on one voucher. The purchase order contains supplier 4343 but the landed cost record contains supplier 9090. When I fill out the information on the voucher match screen I just fill out the Purchase Order number (Before taking the row exit) not the supplier field. From my understanding this should bring up both lines (PO line and LC line) when I do take the Form Exit to Receipts to Match. However the system defaults supplier 4343 into the Supplier field (ALKY).

I am unable to change the Supplier to a blank or to a *  value. The system will always default in 4343 unless the end users need to know what specific supplier is attached to the landed cost line.