Guys you made mistake again ! It becomes reality of Codeforces rounds. It is sad...
But this blog is not criticism and I won't blame your work!
I only want to say that I appreciate your effort to prepare rounds and I am always happy when I see new CF contest in calendar. So continue with work! I will be better and more careful in future contests after this mistake and hope same from your side !
At the end I suggest idea for finding one more coordinator — two heads think better than one !
Good luck and hope to see many new competitions !