How am I already signed up for the draft?

Today I went online to sign up for the draft, and after I put in all my information (name, age, gender, soc #, ect.) and sent it in, I got a message saying that I had already signed up for the draft Feb 16, 2011. I have no recollection of even thinking about signing up for the draft that time last year. I’m kind of worried that somebody out there knows my social security number and it’s kind of freaking me out. What do you guys think this means? Could my mother or father have already signed me up without my knowledge, or do you guys think someone has my SS#?