long contest ranking

My rating in long contest has increased as per the performance graph but my net rating is shown as 0 & my ranking is NA…why???I am very curious…

It looks like there is some bug in the rating system. There are a few other users who have complained about the same thing. Please send an email to feedback@codechef.com about the issue

I’ve observed that users with ratings less than 1000 are showing NA in rankings.

It’s not so easy - http://www.codechef.com/long/ranklist/AX/?page=750