I saw a couple for 90847 and they wanted to share the cost of their conjoint session equally, between two credit cards. I invoiced partner A for 50 percent of the total session charge, and "wrote off" the other half, and billed (charged) Partner B for the second half of the session, using "Add Payment", but I couldn't invoice Partner B. Now it looks like Partner B has a "credit" when he was really just being charged for "his half" of the total session. Is there a way to split a conjoint session between two credit cards in a way that's better? Thanks!