R12 Invoice total on overflow payment check stub not equal to payment total

Hello,

I am on R12.1.3 and have set up my payment documents to have an attached remittance stub with 15 number of lines per remittance stub.  For testing purposes I issued a payment to a supplier for 20 invoices at $100 each.  The payment amount is for $2,000.00.   However, when you look at the total of the invoices on the stub, the total is only $500.00.  It is adding up the 5 invoices on the stub of the payment and ignoring the amounts of the first 15 invoices on stub of the first overflow/voided document.  Do you know if this is