need help

[nsupple]

i tried to create a hidden user account using the tuturial on : http://www.macosxhints.com/article.p...user%2Baccount

when i did it i restarted my computer and at login the account i created appeared i went on it then switched to my regular account and when i switched my regular account settings where messed up, first off the colour of everything on the screen was lighter than it should be and fast user switching which i had enabled was now disabled and when i enable it it doesnt work and if i close system prefs then re open it shows fast user switching off, i logged off so i could switch to the new one and when i logged on as the new one the colors where fine but i had caouple other problems, in this account fast user switching was enabled and so i switched to my original account where the problems from before still existed. i tried deleting the account by terminal typing: sudo dscl . delete /users/hidden

hidden is what i named the new account by the way. now o restarted the computer and when the login screen came up it no longer showed the new account (named hidden) so i logged onto my original account but upon logging on the problems are back.
someone please help. i dont want to but if i have to i will restore my mac but i need someone to tell me how and how to back up everything

if you dont want to go to the link this is the terminal code i originally typed to create the user account

sudo dscl . create /Users/$USERNAME
sudo dscl . create /Users/$USERNAME PrimaryGroupID 0
sudo dscl . create /Users/$USERNAME UniqueID 0
sudo dscl . create /Users/$USERNAME UserShell /bin/bash
sudo dscl . passwd /Users/$USERNAME $PASSWORD
sudo dscl . append /Groups/admin GroupMembership $USERNAME

--i replaced '$username' with hidden (the username i chode)
and i replaced '$password' with the password i chose
please through in any idea you have i am desperit!