Skipping back would imply that a data pointer is not incrementing properly.
Usually, this points to the application program.

"Steve Q" <Steve Q@discussions.microsoft.com> wrote in message
news:719DCC3B-17BC-4D75-B774-1191A2269B88@microsoft.com...
> When printing to a high speed envelope printer (Rena 612) using Rena's
> JetMate program, it will skip back any number of addresses and reprint
them.
> It happens sporadically sometimes every day or maybe once a week, and can
> occur at any point in the spool. I can not duplicate the problem, it just
> happens regardless of which programs are running or after a fresh boot. It
> happens regardless of which data file is used. The only way to catch this
> error is watching each sequential address printed, or after running short
of
> material due to the reprints (which can number anywhere from 50 to 800+
> addresses). Note that this problem occured only after building a new
computer
> with WinXP Pro. The previous computer was Win98SE with the same programs.