bapu
Be careful....
It appears that once you've max headroomed out, all you have to do is wait an hour (or so) and voila, you can sneak in a post or three.
I had the idea last night that submission attempts that are rejected with the "You can't post 2 replies that fast" message get counted... I tend to hit Submit, clear the error, Submit, clear the error, etc. until it goes through - I hate having to wait. That could be why I've exceeded the limit with so few posts.