your roll no doesn't denote how many people have sat for the paper. in that case in august, going by my roll no there should have been more than 1900 people in mumbai!
secondly, i may be wrong, though i would trust the person i spoke to.
thirdly, its the number of people who make it in the end that matters.
like i said, don't waste your energy on trivial things like this. its not worth it.
to put your mind at ease, about 5.5% people made it though the august system. aim to be part of that in the february system.