Duplicate/overlapping log entries

One of our servers was down at the weekend due to power outages here in the area.On checking the log.nsf this morning I saw the time of the outage but the three entries overlap.

One goes from 06/08/2008 02:15:32 PM to 06/08/2008 06:19:16 PM

The next one goes from 06/08/2008 02:23:38 PM to 06/09/2008 01:01:25 AM

And the next one goes from 06/08/2008 05:45:45 PM to 06/08/2008 05:48:15 PM

This shouldn’t be occurring so we are trying to figure why.

Has anyone seen this before?