Prepaid order Generates invoices with balance due

For the second time in less than a week I have an order that when import via Auto Invoice into Receivables generates an invoice with a balance due.  The order had holds that were removed - which is why multiple invoices are generated - but on January 1st an invoice was generated for this Order as prepaid with NO Balance due (as it should) then 7 days later it generates another invoice with a balance due.  And a few days after that the pattern repeats.  The same credit card was used for all three invoices and each has an approval