As far as i can see the msargo played on the server third march 2011, its in his stats ?
Chances that msargo and msargo from 2010 are same are quite hard to say.. well the actually banned player was playing under Dr. Noobface nick and might use msargo's nick as a cover. If not then chances that msargo=msargo are high and there would be a problem why he could connect, and suddenly now not. It might be IP ban, when he get ban (we make an assumption he has static IP) his ISP would change something in infrastructure, he gets "unbanned", and now ISP change it back and BAM...
lol the theories