Log files 'install log' 'IOS Log'

Hello, I am trying to understand how our install log which was current at the time of the last update (ctp) in February now has a date of march 2013.  Some of the other files like ios logs etc have shown the same dates across all environments. Also the permissions have changed from lawson/lawson to root and system. I did do a search on a touch to see if that was the case and the last time was in 2013. Any thoughts on where I can look for what may have happened? I would really appreciate this . Thank you