New Site Not Showing Up and Username Problems

I just added a new site, by going to network admin > sites > add new. All it wants is the site address, title, and admin email. When I created the site, it made the admin's username the same as the address, which I don't want. So I deleted it and tried again. Same thing. All the other sites has usernames that are not the same as the address, which I prefer for safety's sake. How can I have a different username than the site name?

Plus, the site doesn't show up in the dropdown list, or the "My Sites" page. The only way to get to it is from Network Admin > Sites.

It's not mapped yet, but so is another site and it shows up. What could be causing this?