Other mistake: After the Sanderson sisters are done sucking the life out of Emily Binx, they do a little dance thing after they become younger. When either Winifred or Mary swings past her, Emily's leg moves even though she's supposed to be dead. She's also playing with her hands and bobbing her head.
Other mistake: In the scene at the beginning where Phil eats Jason's Heart, you'll notice that he screams like a monster for a bit. Don't you think that the two security guards would easily hear the screaming and intervene, being that they're in the very next room? (00:13:40)
Other mistake: Toward the end, Pubert escapes the crib and is crawling away from the camera. It can be easily seen that it's an animated puppet due to the even movements. A second later, you see the live baby, and the movements are nothing like a moment before.
Other mistake: The scene in the hospital, where Maniac Cop shots two people on the stairs is not in the hospital. It's a scene taken from Maniac Cop 2 during the police station massacre.
Other mistake: After the Leprechaun has used the small car with the pitchfork and rammed the pick up truck, it rolls down the hill 3 or 4 times. The leprechaun opens the door and all 4 characters are not in the vehicle. They have not only managed to all exit the vehicle and hide behind a boulder but have all managed to not receive so much as a single scratch and Jennifer Aniston's hair is still perfectly brushed.
Other mistake: Before the opening scene, where there is a paragraph setting up the history of the musical, in the third line there is a spelling error: "it's" should be "its" since it is a possessive pronoun and not a contraction.