Quick blurb by me. I know another two posts in one day. I've been having trouble with commenting on some blogs and was getting completely frustrated.
So, I tweeted about it and thanks to Stina and Christina Lee during a quick twitter conversation, the problem has been answered. When you sign in to blogger you must unclick the "keep me signed in" button that is below the login info.
It worked for me and now I can finally comment on some blogs that blogger was giving me trouble with.