Plutonium

So, I got banned for some reason, and I'm confused as to why. I created an alt account to try to get around the issue, (this one) but obviously this didn't work. My original account is just 'domn8u'. I was banned on there originally, and I presume the ban was extended when it said that I had to wait twelve days on this new account. I don't know why I was banned though because I didn't even play on a public server the last time I played this game, or even the last few times, I don't think. Could use a little help/advice here. I'm unsure of what to do because I've been trying to play with friends on all of the maps before school starts to really pick back up.