Other mistake: A poster in the school states that the Academic Decathlon takes place on October 14-15. But later on in the movie, another poster says it's on September 14.
Suggested correction: Was in a similar thing in HS. Not too surprisingly, we had more than one event throughout the year. In fact, I've never heard of an extra-curricular with only 1 event. Likely 2 different meets.
They said later on, though, and that would go into the next school year, which is weird for most extracurriculars to have pre-planned events for the next school year.