strange sshd log message every minute
Solution 1:
Do you have some kind of system monitoring tool (monit/collectd) that could be checking to see if your ssh server is alive and accepting connections?
Solution 2:
Jun 14 12:46:00 mybox sshd[25761]: Server listening on :: port 5522.
Jun 14 12:46:00 mybox sshd[25761]: error: Bind to port 5522 on 0.0.0.0 failed: Address already in use.
I think whatever script is starting your sshd is failing to detect that the process it running and restarting it repeatedly.