Yes, that's quite a mess. I'm afraid I really don't know enough about it to help much more; the only thing I can suggest at this point is to go through the Blog options pages and hit the "reset" key for each one. Maybe that will get you back to a 'normal' looking blog and you can start over.
If not, you should try posting the problem on vbulletin.com, and don't be so protective with the login. Either temporarily open up the blog so everyone can see it or just go ahead and publish that test account. I've never known anyone here to abuse a test account, and you can delete it in a few days anyway.