The screenshot was taken 53 hours after you stole from an unclaimed area which dated you in the area on 8/31. You were logged into the server and if you want, I can provide further documentation of your activity at that time.
Be that as it may, even if you claim it was not you logged into the server, it was your account. Players are responsible for the safety of their account.
Considering your history of stealing on the server, you either leave your account unlocked multiple times, or you just don't care about the plain and simple fact that raiding/griefing/stealing is not allowed on CSMC and players will be punished when they break this rule.
If you decide not to come back, that is your decision. You're more than welcome to keep playing with us, but if you break our rules, you will not be welcome back. It is entirely up to you.