Other mistake: When Sheriff Tucker shows Pam the newspaper clippings taken from Roy's wallet, plainly two of three columns in the article are identical and have nothing to do with Jason. (01:21:35)
Other mistake: When Jason slices Pete's throat from the back seat with the machete, it goes deep, and blood should be gushing from Pete's jugular. But in the following shot, the edge of the knife has barely grazed the rest of Pete's throat, leaving only a fake trail of dried blood.
Other mistake: After Raymond gets stabbed by Roy and falls dead, there is no blood visible on his body.
Other mistake: It seems unlikely that the police would have let Tommy keep Roy's hockey mask, as it's evidence.
Suggested correction: Already listed and corrected. It is possible that it was actually Tommy's dream.
Other mistake: After noticing that Tina is dead, Eddie fearfully backs away and leans against the tree. You can see Roy put the leather up and over the tree. This is impossible. He would have to whip it around the tree, not over it.