I originally started playing SK through steam. So when i log on through steam it uses my steam ID.
But Steam is running poorly on my computer and i tried to log on via Sk.com and it tells me my user name doesn't exist.
Can i get around this or am i stuck logging on via steam?
Your username doesn't exist cause you are trying to log in with a different kind of account. If you want to play without steam you need to create a SK account on its site and start all over.