In need of some advice....

This is kind of how I feel right now, a little upside down, and if anyone knows how to solve my problem, I would be so grateful for the help.  It seems as though on half the wonderful Blogs that I "attempt" to make a comment on, though I am a follower, I cannot do so, it always comes up that I have to make a choice of different ways of posting, and the only one that works is if I do it anonymously.  This also occurs, when I'm on my own comment page, and try to respond to a sweet comment that someone has left, and I don't want to be rude by responding like that.  I don't like this very much.  So, any advice, please let me know, I'm obviously doing something wrong, or my settings are incorrect.  Thank you!!!