Have had a very similar problem in our CC...
Someone set up a 20-cr bracket - but only had 8 signed up after about 2 days - and now the link to the competition is missing in the main game screen under CC competitions/brackets.
But what is odd, is that the comp is still showing on the CC Profile window - under CC tournaments - and is in the open list, not closed. I even managed to play the round from this link - but the score is not registering on my profile page.
Is there a time limit for bracket sign-up - and what happens to the credits paid in already if it has been cancelled?