Weird Xbox Live Problem Help?

[Will C]

Ok so i went on xbox.com and i made an account and clicked enter. the thing is i was already logged in on an account. So when i finished it randomly went back to the home page and it said that my other account was logged it. I Then tried to log into the one i just made and it was not working. i Then looked it up and it says it doesnt exist. i then tried to make it again and it said the name was taken. What should i do i refuse to use any name but the one i had picked out