I don't think you'll be bored in novice. I bumped down into novice last year because I was having some bike problems. I was surprised at the pace the novice group was running. I'm not sure why you wouldn't be able to register for Novice Saturday and Intermediate Sunday. I think they by bump ups they are referring to mid day changes. I've riding with 3 different track day orgs this year, keeping the rules straight between them is a challenge 
