Maybe the reader saw one sent in earlier and has decided that's his or her favorite. This didn't happen at Moondance, but it could happen in other contests. They seriously hold the script together, even to the last page. Your script is roughly handled, by three or four people. Print only the script title and author name on the front.
Any color is OK, but white, grey or tan are preferred and more professional looking.
Do not bind your script in a highschool plastic binder or one with metal bars inside. Nothing else is acceptable but front and back card-stock covers. That makes the script look old and shopped-around. The festival readers or registration people will do that when they receive the entry. Make sure it's nice, clear, and clean, with black ink.