When the invoices were entered in AP, they were entered and posted with terms of net 60. That was confirmed when I checked the posting journal. That is what is confusing. Net 60 - however, the invoice dated 12/07, posted with net 60, has a due date of 1/24/08. It was not forced. The status was not changed. This invoice did appear on the grid when I previewed the pre-check register.

Thanks for your help!