There was a guy who posted 3 times in a thread then it got locked. When I looked at his profile count it was 0 but next to his name it was 3.
Therefore:
Profile post count = All posts - locked posts
Forum post count = All posts
Avatar! Yes, I created the very first DSi Browser extension! (http://dsiextensions.co.cc)
I just updated the post count to be consistent. The math got a little more complex now that threads can be both locked and deleted, and I hadn't finished making those updates throughout the website.