[Mailman-Users] Monthly password reminder is always sent twice?

[Mike Loiterman]

My email lists seem to be sending out the monthly reminder twice to each
user.  Is there a simple way to understand why this is happening and how
to fix it?

I've checked the crontab entry and it looks like this:
# 5 AM on the first of each month, mail out password reminders.
0 5 1 * * /usr/local/bin/python -S /home/mailman/cron/mailpasswds

and there are no duplicates. 

I'm sure someone has seen this before??