I have a similar event as Hendra Gunawan had.  When I hit tab after selecting a payment method, there is a new record set that appears below that defaults to the amount due BEFORE the current payment.  Thus, if the customer is making part of their payment in cash and part by credit card, I have to reflect one of the payments on one line, exit the form, then reopen it for the additional payment in order to get the proper amount in the amount due.

I noticed that when Richard tabs out of the PaymentMethodCombo, there is no new record created below the one he is working on.  How does this happen?