Legit. subscribers not showing up in admin list, but spam/hackers are!

I just launched my blog – and got 5 subscribers when I check my (admin) user list. HOWEVER: all 5 look like spam to me! Here are the suspicious subscribers (from info I have in my WP admin):
[email protected] (shows “username” of GuillermoLusk)
[email protected] (shows “username” of KassieUnderwood)
[email protected] (shows “username” of Liza7869mer)
[email protected] (shows “username” of LorenGladden)
[email protected] (shows “username” of youstkatmic)

And here’s my bigger problem: I also know that I have at least 3 legitimate subscribers, BUT NONE of the legit. subscribers shows up on my (admin) “user list”.

I just installed the “Stop Spammer Registrations” plugin (today).

Thank you for your help!