It does say that you edited it. If it were someone else, like a Forum Leader, it would have their name there. That can't be changed.
This is a good time for a reminder that you are responsible for your account at Tech-Forums. However it happens, if it would happen, that someone posts using your account and they break the rules, you'll get the infraction(s) and the banning if it's appropriate. You might want to make sure that you don't leave your computer logged in when you're not around or awake and that you change the password if you have had a keylogger.