AP invoice approval is not working if one invoice has both PO and Non-PO lines

AP invoice approval is not working if one invoice has both PO and Non-PO lines. Business has a requirement that if an invoice matched to PO and a manual line also added to this same invoice then non-PO line should to approver1 based on amount and PO lines go to one level approval to approver2(AP Manager).

How can I achieve this? Currently it is not working for me. Standalone non-PO invoice lines are going to correct approver and if an invoice is PO-Match and have no manual lines then that is also going correctly. Please suggest how to handle this?