I cant seem to 100% the Lego expansion

I have completed all brick challenges and all the races but the stats still tell me that I have 30/33 exhibitions completed, ive looked over the valley multiple times but dont see anything I havent done, plus seeing as I’ve completed all the brick challenges would mean that I have done all the races.
Any ideas?

Have you gone to the 3 championships and selected normal event instead of championship?