For unknown reasons, we installed anacron on Tempest, and so many of our /etc/cron.daily scripts have been running multiple times. My best guess, based on the timestamp on /etc/cron.hourly/0anacron is that we installed anacron on September 12th.
There’s no obvious way to turn anacron off (it’s not in chkconfig, for example), so it seems to me the best thing is to delete the file in /etc/cron.hourly. I’ve done that.