Ok, heres a list of things you might have done wrong. When you see one that you did, say so.
Hacking: Fly, speed, xray, misc hacks.
Theft: Stealing other peoples pixel goodies.
Grief: Destroying other peoples pixel stuff for no reason.
Trolling: Being a jerk in chat, or spamming chat with junk. Being annoying in game, getting in peoples way, killing their dogs (I believe you were banned before the update so this MIGHT not matter, if you were that is), other troll like activities.
Other: Might be other causes that I can not think about, not sure how much else there is, so its on the admins to know. I know I probably left something out on accident.
Now, ending on that note. I think you deserve to be unbanned, just because of your persistence, and your patience. I am very happy with your attitude with this situation, you have been calm, and not a writhing troll like I have seen in many other posts. Hopefully an admin will look at this and resolve the issue. Have a nice day, and hope you make better decisions in the future!