Hello,
The issue was because someone else already had the name Evilstewie and because your name had to be changed via the Database there was no check for it so it just made two Evilstewie user accounts and also the other account has been active so we won't change their name. Your new name is now Evilstewie1 ( Please take note of the 1 at the end ) You will either have to think of a new creative way of making your name or find the other person using it and ask them to change it to something else. Maybe stop fucking around with your name so much and you won't have this issue.
Contact me on steam if you have any more issues DO NOT MAKE AN ALT!
steamcommunity.com/id/RedPowder/
Edit: I just seen your reply to luan claiming the other account was your old account so if you can prove this some how we can change the name on it. <-- This wouldn't of happened if you used a real email address