I recalculated the PCs, based on post counts <b>in forums where posts are counted</b>. There are only 3 forums where posts don't count: off topic, flamewars, and humor. However, once upon a time, these 3 forums <b>did</b> count towards your post count. Therefore, the difference in posts you see is the amount of posts you had posted in those 3 forums before they stopped counting towards your post count.
So technically, it's not that post counts are incorrect now. Rather, they were incorrect before. Capish?