Match Invoice to PO Receipts-matching line type is FREIGHT in Find Receipts for Matching screen

Hi

We are matching invoices to Purchase Order Receipts and we noticed that when we try to match the invoice to PO receipt with line type = Freight if the Invoice's supplier site is not same as the Purchase Order' s supplier's site the PO receipts line does not come for matching, if the line type is item it works OK

Is this standard functionality ?

Thanks for any comments, suggestions.

Prem.