Medical Provider/Payor

When entering in invoice amounts in the medicals tab, I want to show payments made by our client.  I know how to add a payor to the line and then enter the client as an additional payor, however, when I do this it creates a “provider” contact box in the contact details section under the widgets. So when opening the matter it shows numerous contact entries for the client--one for “Petitioner” and the others for “Provider”.  Is this a glitch or am I inputting information into the invoice section incorrectly?