So I can't read the actual popup from the question mark, does No mean once you've reached the number of players at a position, no more players can sign?
The question that hangs over the browser so you can't see it says, Block additional players from signing offers once you have met your desired number of non-cpu players?
So you have to hit yes that you want to block or no you don't want to block, but since that question is cut off,and you have too minimize your browser in order to read it, people get confused.