Comments, following, etc....

Why can't I leave comments on some blogs? I type the post, it asks for what profile or something to use and no matter what I pick ~ google account, URL, etc the comment post goes off into cyberspace...any help gang??

Sally ~ thanks for your comment but I couldn't leave one for your blog on the little black dress....

Peeps that say they are following me don't show up on my blog list of followers ~ what's up with that?!

And where do you peeps get those cute backgrounds and where do you post the computer language on your blog settings to get them to show up?

I'm not very computer savvy.....but I try!! ;-)