Plot hole: During the end the murderer is thrown out the front window of the building. The students leave the building through the front door, but yet there is no body, and that doesn't seem to bother them!
Audio problem: A soda can that is supposed to be full hits the man. When the can hits the ground you can hear that it's empty.
Continuity mistake: When everyone is running out of the theater, a woman with a red belt and yellow purse can be seen exiting with the other terrified patrons. A few seconds later, the exact same woman is seen running out of the theater again.
Other mistake: When they encounter the first ant, the policeman runs out of ammo, but the FBI agent fires at least nine shots. Not bad for a snubnose revolver that holds 5 or 6 rounds.
Factual error: Budapest didn't exist in 1489. The cities of Buda and Pest weren't combined until 1873.
Revealing mistake: When the oldest son is being pursued by the unseen entity whilst the family is seeing the priest. You can see a crew member in green pants and brown shoes to the left as the camera perspective turns upside down.
Visible crew/equipment: 25:05 into the second episode of the TV miniseries, in the scene where Nick Andros and Tom Collins meet Julie from the drug store, the boom mic is seen for several seconds at the bottom right of the screen after Julie crosses the street to meet them.
Visible crew/equipment: When Rachel pulls up to the crime scene where Jake was killed, as she gets out of the car you can see a grid of set lights reflected in the car window door. (00:12:30)
Continuity mistake: In the 1978 flashback scene, Michael does not have 6 bullet wounds in his chest from when Dr. Loomis shot him moments earlier.
Other mistake: Whenever Helen Hyde turns back into Richard Jacks, none of the clothes ever seems to rip or stretch - they both have different body types.
Revealing mistake: After Martin cuts his arm off, there are several scenes where you can see the bulge of the actor's real arm under his jacket. This is most noticeable when he is running through the birch wood, and when rooting through the ruins of the burned cabin.
Continuity mistake: Minnie gives her the necklace with the tannis root inside and Rosemary holds the chain between her thumb and first two fingers. In the next shot the chain is draped over her fingers. (00:32:15)
Continuity mistake: In House of 1000 Corpses and The Devils Rejects Captain Spaulding had nasty crooked black teeth. In the beginning of this film when he's doing an interview his teeth are super white and straight.
Factual error: Abby has trees surrounding her house yet there aren't any in Nome Alaska.
Factual error: In the scene where Arthur first enters the house and starts going through paperwork, there's a shot of Nathaniel Drablow's death certificate which shows 'body was not recovered' in the box next to his cause of death. Such a thing would not be written on death certificates of the time - that box is reserved for 'Signature, description and residence of informant', a heading which can partially be seen as the camera pans across the certificate. For the death to have been registered, an informant's signature would have to have been there. (00:20:05)
Continuity mistake: In the beginning when the water skiers are practicing, in one shot they are skiing right next to land and trees, in the next shot they are way out in the ocean near the ports. (00:03:25)
Continuity mistake: When Scott gets his throat cut, blood pours out. Yet when Terri spins him around, there's no blood anywhere on him except a small amount on his shirt sleeves.
Other mistake: When the two Americans are walking on the moors, their shadows are always in front of them, despite them having changed direction numerous times. Additionally, with the moon always being behind them, how are their faces being lit?
Other mistake: Andy and his friends are watching "Texas Chainsaw Massacre 2" in one scene. However, the scenes they watch are completely out of order compared to the actual film.
Other mistake: The type of gas pump Danny used when gassing up the car requires the lever be moved from the on to off position before the hose can be placed back into the pump. It is already in the off position before he finishes.
Suggested correction: Actually this is simply a movie convention. When kids watch films onscreen, they deliberately only show the best bits of the film as oppose to just playing the film normally. Otherwise it would look dull and pointless.
Explaining why a mistake exists doesn't invalidate them. Skipping time or jump cuts is one thing, showing scenes from a movie kids are watching out of order, without a valid in-film reason, is still a mistake.
The issue isn't that they aren't showing the whole movie. They did the right thing by just showing clips, since it illustrates a passage of time. The issue is that the clips they show are all out of order. (You'll see one from the ending of the movie, then one from the beginning, then another from the ending, then one from the middle, etc.) They could have just as easily shown a couple clips in order from throughout the film, and it would have worked, but they chose not to for some bizarre reason.