Oh, and 'set jealousy' is super, super gh3y. Not happy-silly gay, but fully expressed Freddy Mercury dressed-as-a-pvc-clad-nun gh3y.
You should not let this **** bother you. The very fact that it's not obvious that any 'dominance anxiety' you have with these more junior students could not be resolved by you simply kicking their asses in a hard sparring session makes me doubt the culture of your school and make me wonder if the 'secret baji form' you were recently shown wasn't just some **** your teacher made up to pacify a couple of long term students who are obviously anxious about being the 'golden boys' and think that knowing a form other people don't know will somehow establish this position.
Harsh but fair. Harsh but fair.