Deliberate mistake: The scenes involving the 8mm projector and screen did not also contain legitimate light rays from the projector to screen or show any obstructions on the screen despite Joe or someone else between the projector and screen. What showed on the screen is what would be expected if using a videotape or DVD.
Other mistake: Joe and Alice were somehow able to get the sheriff down from his inverse suspension, but - given the height of the ceiling and depth of the hole - the sheriff's feet (where they would be tied for the inverted suspension) would be out of reach. Moreover, surely a knife or cutting instrument of some kind would have been needed to cut the rope (assuming a rope was used) - did Joe happen to have something in his backpack? What was shown to the viewer was Joe and Alice using their hands on the sheriff's waist to lightly sway him two or three times in an attempt to get him down. The viewer next saw the sheriff when all but his feet had landed on the ground. For the sheriff to fall unharmed - head first - is far-fetched.
Other mistake: When Joe picks up one of the cubes and puts it in his jacket pocket, Charles is nowhere around him. Later, Charles tells Joe that he told him not to touch it [cube] in the first place.
Answer: I don't believe Alice said she "wants to see her father die", and I'm not sure what you mean by "for all he [Mr. Dainard] did to her." Alice told Joe that SOMETIMES she wishes her dad would have died instead of Joe's mother. When Joe replied that she shouldn't say that because he is her dad, Alice got his point and did not continue to say anything else, such as that she really meant what she said. What did Alice's dad "do to her"? He did say she wasn't going to Joe's party (which she made up). He told her to go in the house and wanted Joe to leave. After Alice went to Joe's and tried to sneak back into the house after dark, Mr. Dainard told Alice to "leave", just like her mother did. As soon as Alice was out the door, Mr. Dainard immediately followed to get her back and suffered injuries trying to do so (but the "monster" got her). Alice probably didn't know her dad told Joe's dad (deputy) that he did not want Joe seeing his daughter again - she was "off limits."
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What did Joe's dad (Mr. Lamb) "do to him"? He tried to get him to go to summer camp, but didn't make him. He said he wished Joe wouldn't hang around a certain friend (Cary) so much because he kept lighting things on fire - but didn't stop him. When Joe dropped a flashlight on the kitchen floor, his dad told him to pick it up. Mr. Lamb told Joe to make sure he fed their dog Lucy. Mr. Dainard made it clear inside the sheriff's station that Joe was not to be around Alice anymore, so when Mr. Lamb caught Joe with Alice on the street, he put Joe in the police car, took him home, and demanded that he stop seeing Alice and said they could not be friends. I don't see any behavior by Joe's dad that would make Joe want him dead.
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