There are multiple places from where config may be placed to the /etc/logrotate.d/ directory, and some of them conflict. This leads to the logrotate daemon errors and improper rotation.

Known conflicts:

• /var/log/messages configured via /etc/logrotate.d/rsyslog (from rsyslog deb package), system-syslog.py, and system-logs.py.
• /var/log/auth.log configured via /etc/logrotate.d/rsyslog (from rsyslog deb package), /etc/logrotate.d/auth (from vyatta-cfg deb package).

Conflicts should be resolved and checks added, if possible, to avoid this in the future.