I have a client who has a problem with the due date of an invoice for invoices transferred from Order Entry. There are many instances when the due date is BEFORE the invoice date, and the due date error is not consistent. For a particular customer, there may be several invoices created, and only a couple has the correct due date. To correct the problem, the client changes the invoice date back one day, then back to the original invoice date and the correct due date appears. All recent service packs have been installed. Any suggestions as to what is causing this?

Thanks,
Lars