Audio problem: When Junior is riding his motorbike around, screaming "they hurt me, ma," in many wideshots we hear him yell but his mouth is closed. (00:55:20)
Audio problem: When everyone is running after the police car, we hear Robin shout "Hey guys! Joey, c'mon!" but her mouth is shut. (00:14:05)
Continuity mistake: Jason chases Pam with a clean machete, however in the shot just before he's hit by the tractor, the machete is bloody. (01:10:40 - 01:11:20)
Anita: What's wrong? Hey, you okay?
Demon: It's them damn enchiladas.
Trivia: A fan theory on Reddit suggest that Roy Burns was possessed by the spirit of Jason Voorhees. There is some credence to this theory considering that the murders Roy committed would require inhuman strength, he broke down a solid wooden door by just walking through it and when he got hit by a tractor, he got back up very quickly. How he got possessed by Jason however has never been explained.
Answer: Yes, originally Tommy was going to be the new Jason. But the makers decided to go in a different direction for part 6.