Other mistake: Daphne's dad drops the Legitimate Tulip badge in front of her so she'll avoid getting hurt, but when we see him do that, he does it before the warning for the ball is heard and seemingly not looking at the danger (especially in the second shot, when he is peeking from the corner). So his action makes no sense. (00:16:55)
Other mistake: For some reason, getting to school Velma does not simply fail to change path for anyone in her way, but actually, deliberately, gets in the way. During that sequence, she ends up bumping a girl with a muffin, and stomping on it. But the girl with the muffin was already in the same spot (just past a couple who is chatting) well before, when Velma moved between other two chatters, with a guy on a scooter changing course. (00:06:15)
Other mistake: Daphne and Velma ruin Mikayla's exhibition that is set to begin at 4 PM, so they must be in the corridors way before that time (when they poke out of the locker secret door from the inside, the hallway clock does in fact point 5 minutes to 4). They get then chased by the ghost and find the secret lab. When they come out of it to prepare for their Bloom mission, they pass in front of the principal's hall as one of their first actions, and it's a quarter past 7 (or 6). There's really no way they spent over two or three hours doing all that - not to mention that during the call with the mom she says she was tired and wants to finish the work tonight, which is something certainly possible to say mid-afternoon but more likely at an hour when it is dark outside like the one shown in the film finale, and Velma picks up the a drone that is snoring in a rather dark room, making even more obvious how the time seem to have gone by in a blink. (00:51:35 - 00:58:17)
Other mistake: It is revealed - well, spoiler! - that the one of the characters is a hologram. The problem with that is, the immaterial hologram (he is presented as such), has had a few interactions with objects. In the scene at school the principal did not touch him, making it plausible, but then he ate a piece of pizza, which should have been holo-pizza. Assuming it is possible (it's all his own tech after all) in the very final scene he has more. One could say that the chair he initially sat on turned on its own and so it is automated, but he actively flips a switch on his desk, and he sits on a different office chair, making it also wobble under his weight. It should be noted that Daphne spots the fact that he is a hologram by pointing to the projector for it, but there was never any light beam like that before (would have been super-obvious in the theater scene earlier) and Bloom always cast normal shadows. (00:33:15 - 01:02:50)
Other mistake: Velma has to climb to the top of the Bloom Bracket. When the chart is shown before the montage, a girl called "Kristina Davies" (blonde with short hair) is in second place behind Mikayla Martin. Once the bracket is shown after the glue prank during track and field, Velma is climbing above a Kristina Davies who is in 148th position, and has the profile photo of a dark haired girl with long curly hair. When she climbs above number 88, the same name is at the top of the screen. How many Kristina Davies could there be in that school? (00:48:05 - 00:48:45)
Other mistake: The second time we see the 'French toast' scene, Daphne says the line on top of the stairs in a different way from the first. She is simply standing with both feet on the penultimate step, while the first time around she began saying the line when one of her feet was still in motion. It also takes her twice as long, no cuts, to get to the bottom of the stairs. (00:04:30 - 00:16:30)
Other mistake: Nothing about Nedley Blake's interference in his daughter's morning routine at home makes remotely sense the way it is shown. It takes him 18 seconds (with cuts) to do something that needed to be made in the 6 seconds it originally takes Daphne to come down the stairs, and the first time around he was also shown arriving from the kitchen, which would further expand the time needed (considering also that the second time he apparently dropped the tray, causing rattling noise that Daphne should have heard). Not only that; the playlist action (which is something her computer science mother could have easily done with actual software, especially given the level of tech available to every teen in the movie) takes twice as long too, and at the end of it he exits the frame from the wrong direction - he should have headed left, because he needed to get into the closet to pass Daphne the proper clothing posing as the automated wardrobe.
Other mistake: Velma tries to "override the system" to free Mikayla; the screen fills with the typical pseudo-hacker gibberish from the Hackertyper app, and she asks Daphne to tell her the serial number; Daphne reads just the first part of it and leaves out the rest.
Other mistake: From her position, looking down on Daphne and Velma, Principal Piper couldn't have spotted spot right away the fact that they are missing the badge. (00:44:25)
Other mistake: Daphne and Velma chase Griffin when they are on their lunch break, but when he enters the locker the clock shows 20 to 9. (00:43:50)
Other mistake: Daphne is crying in her room and texts Velma. The message has a "Read" time stamp saying 9:33, followed by Velma "typing" in response at 9:32. (00:18:40)
