I assume its counting the people whom have reached the Extra stage , Seeing as you would be placed onto the extra stage once you've completed your 200 floors , only right now people who reached 100 are be placing on the Extra stage so once the 2nd Half begins it will allow us to progress from 100 to 200th, I myself have been stuck on the 100th floor for quite some time , but I could be wrong this is the way I see it