Hi, Tina,
Like Ledger, Payables has a File | Data Integrity Check function. Always best to make a File | Backup before running the integrity checker. If it detects errors, the Rebuild button may become active, If so, you can Rebuild and then Check again (and repeat if necessary).
Other than checking integrity, you'd still need to provide more information about the invoice. It sounds like the amount that displays as the Batch Total in the batch window is different than the amount that displays as the Invoice Total. Or, the amount of the invoice detail is different than the Invoice Total in the Invoices list window of the batch.
That's a pretty old version of Payables you're running.
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Regards,
Softrak Tech Support