The organizer simply didn't pay close attention to the calendar, and you've already started such a heated debate here.
Well, when you say "you," I hope you're not specifically addressing me...;), otherwise, it seems a bit harsh to use my post as an example...:)
It seems like people aren't in a hurry, probably hoping for the last day of the tournament - September 31st...;), but there's still one day left ;)