Payment - Current Balance versus Payoff Balance
If you do not understand the difference between payoff balance and current balance, refer to Current Amount versus Payoff Amount.
A payment segment financial transaction almost always affects payoff balance and current balance by the same amount (think of it like this - when a customer pays, the amount they think they owe goes down by the amount they really owe). The only exception is a payment segment for a charitable contribution. These payment segments only affect current balance because the customer was never billed for the contribution in the first place.
Refer to Setting Up Payment Segment Types for more information about how payment segment type affects how a payment segment is produced and how its financial transaction is generated.