log messages are doubled and unclear

Played today with accounting and read in notice log :

Mar 19 18:49:51.000 [warn] You have set AccountingMax to use hibernation. You have also chosen a low DirPort or OrPort. This combination can make Tor stop working when it tries to re-attach the port after a period of hibernation. Please choose a different port or turn off hibernation unless you know this combination will work on your platform.
Mar 19 18:49:51.000 [warn] You have set AccountingMax to use hibernation. You have also chosen a low DirPort or OrPort. This combination can make Tor stop working when it tries to re-attach the port after a period of hibernation. Please choose a different port or turn off hibernation unless you know this combination will work on your platform.
Mar 19 18:49:51.000 [notice] Tor 0.2.6.5-rc (git-e0b77cd3194d705f) opening log file.
Mar 19 18:49:51.000 [warn] Failed to unlink /var/lib/tor/data/bw_accounting: No such file or directory
Mar 19 18:49:51.000 [notice] Configured hibernation. This interval begins at 2015-03-01 05:00:00 and ends at 2015-04-01 05:00:00. We have no prior estimate for bandwidth, so we will start out awake and hibernate when we exhaust our quota.
Mar 19 18:49:51.000 [notice] Not advertising DirPort (Reason: AccountingMax enabled)

Beside the doubling /me wonders why tor warns about DirPort (or ORPort) - but then noticed that it will ignore DirPort (anyway).