I backed this game on kickstarter, and since the first day I played PA, I've played as "melted". Today I log in, and I'm "melted (1)". When I try to change it back to melted, or tell it to use my steam id (melted), it tells me it's not available. How did I lose my handle to someone else?!?!
There was a problem a long while back where the Steam name suddenly couldn't be used and the (1) was added. The original username got stuck in some sort limbo. It's a while back, so my memory about it is foggy, but you could try mailing support@uberent.com since they might be able to sort it out for you.