I just wanted to post this note for anyone that has this problem.
I got a message from someone trying to sign up where the site would not allow them to use the e-mail they signed in with.
I had this problem myself actually.
So, I would like to just post this just in case someone else is having trouble.
If you do not get a confirmation e-mail about your account here relatively soon after the initial sign up, sadly, you will have to re-sign up with another name and e-mail.
I know this is a bit of an inconvenience, and I apologize for this.
I do not know of any other way to get around this issue.