It's always good to see new people hosting cups
I'm not going to remove the cup though; you opened the cup, so you should be able to modify the description of the cup.
You seem dedicated to hosting a cup, so I see no reason to reject this cup.
As for deadlines: you can use the TUS system itself for setting specific dates as well, so no need to put specific dates in the cup description. You can just mention the amount of days for each round and the end of the signup time will tell all participants all they need to know.