I noticed the same thing, AND....
Not only is the post count frozen, but when I did post, it added old/obsolete info from my "interests" along the left-hand side.
I'm waiting to earn enough status to have a "signature"; I know that that takes 90 days and 90 posts. I have the 90 days; I don't have the 90 posts yet. That's why I pay attention to the post count!
So, in order to tell folks my upgrade percentage, I keep that listed in my "interests". I updated it from 14/14 to 15/15 sometime last week, but the post I wrote yesterday still had the 14/14 on it.
Help get me my signature!!
Thanks!