[nag] Editing a tasks due date

[Rick Emery]

Sorry if this has been addressed in the past, but I just recently subscribed to
the list and from work I can't connect to the news server hosting the archives.

I had a task with a due date. The meeting on the due date was postponed a week,
so I edited the due date to push it out a week. Instead of changing the due date
of the task (as I expected), it created a new duplicate task with the new due
date, leaving the original active.

It's not a big deal, as I just marked the old task as completed (or could even
delete it), but I was just wondering if this was expected behavior.

Thanks in advance,
Rick