Observations On Our Life Here In North Carolina
Tami - I had that problem a couple of months ago. The only way round it, for me, was to install Google Chrome. I now use GC for anything relating to blogging, and normal Google for banking, etc.
I had the same problem a while back and had to take off the "stay signed in" on login.
I had (have) the same problem too and am able to use the 'Name/Url' way even though it means copying/pasting my blog's url everytime I comment ....at least I don't show up as 'anonymous'. It's odd, because it's only on certain blogs...not every blog. Like yours, I've always been able to comment easily....sometimes I wonder if some folks haven't tweaked their blog's 'settings' or something by accident. Hope you get it figured out.