i am having the exact same problem. i am absolutely positive i selected the register domain, it comes up on "my center" and when i try to re-register it through eleven2, it says it's already registered. a quick jaunt over to godaddy shows that my domain is still available.
this is going on FOUR DAYS after eleven2 charged my card. emailing tech support gets me a typical "we're currently looking into it" response. also, i am completely unable to post in their forum about this problem, claiming i "do not have permissions to access this page" or the forum section is down.
needless to say, i'm pretty disappointed. E2 gets rave reviews from this site and their customer feedback forum is nothing but praise, of course. i see that some E2 guys post here so hopefully someone will see my post and get it done.