Other mistake: After Steve slides open the middle window near Olivia, a small puff of air and some small waves of the right curtain panel can be seen, but not nearly as much or strong as would be expected. The left curtain panel was largely stationary. With the window completely open, the right and left panels of the thin curtains should be blowing inside the RV at an angle or even be flapping outside of the RV. (00:10:45)
Other mistake: The protagonist finds out that his wife is cheating on him, and decides to try to dial the killer. We see his phone number, it's 328 241... Later on, after visiting his brother's parish, he tries to contact his 'frenemy' again but the number now is 386 909.etc. He can't have changed number in that short while (and the protagonist wouldn't know anyway). (01:03:10 - 01:10:55)
Other mistake: Although it was pouring rain, no rain came into her car when Deb opened the window. Similarly, the floor by the front door of the convenience store (gas station) stayed dry despite customers coming in during the ongoing heavy rainfall. (00:25:24)
Other mistake: When Michael borrows a cell phone on the train, he goes to the back to get a signal. In reality, walking around on a moving train does not do anything because you're already moving.
Other mistake: After Kevin and Holly go kayaking in the ocean and get to shore, their upper bodies and hair are dry despite having been in a tandem-style sit-on-top kayak, which generally means the kayakers will get quite wet. (00:03:40)
Other mistake: A female bull shark has between 1-13 pups. The exact number in the movie is questionable (due to their speed), but appeared to be well over the maximum 13 and perhaps closer to double this amount. Classified as "other" instead of "factual" mistake because the mother shark's DNA was altered, which could possibly explain a higher number of pups per pregnancy. (01:03:20 - 01:06:40)
Other mistake: Miles, a 17 - or 18-year-old whose "grades were trash", may have been able to fix his motorcycle, but it seems highly unlikely that he would be able to fix (a few times) a highly advanced robotic dog like A-X-L. [A-X-L was able to self-correct certain things.].
Other mistake: When Tyler is in the bathroom brushing his teeth, he is facing a wall-sized vanity mirror. The mirror should not be able to reflect the window along the adjacent wall (along the right side). Also, regardless of what angle of Tyler the mirror is reflecting, it reflects the same image of the wall. (00:30:26)
Other mistake: McGonagall appears as a young professor at Hogwarts, even though the movie is set in 1927 and she wasn't born, according to the official Harry Potter canon, until 1935.
Suggested correction: JK Rowling, who had admitted she's terrible at math, has changed her mind about McGonagall's age multiple times. First she said she was 70 in 1995 (putting her birth year as 1925), then on Pottermore she said she was born in 1935, then after this movie came out she nixed that section of Pottermore and left her birth year unconfirmed from then on. If the author who created this world can't make up her mind on how old she is, we can't definitively give her a year of birth either.
Other mistake: The "Ten Killer" slashed Katherine Hourback's face/head close to 50 times (off-screen), leaving her face covered in blood. When Dan found Katherine's body in his front yard, there was diluted blood on her face (mostly left side), but no indication that she had been slashed with a utility knife about 50 times. Also, during the slashing, the Ten Killer's "aim" seemed off (too high for a victim sitting in a chair and with no adjustment for how her head might move after each forceful blow). (00:45:05 - 00:46:53)
Other mistake: When Earl is walking toward his seat in the auditorium's third row at the "Glam Cosmetology Graduation", up to four seats can be seen in rows #2 and #3, but five seated graduates can be seen in row #1. Row #1 is closer to the camera than the other rows, so four or fewer graduates should be visible in row #1, not five. (01:07:20)
Other mistake: In the close-up of the gun freshly printed, there's a bunch of molten plastic by the gun cylinder and the grip. Waikiki retrieves it right away, bare handed, and the bed is completely clean too. (01:03:25)
Other mistake: Constantine is driving along a road and an big rig truck is heading for him head on. The truck honks and they both hit the brakes, stopping just a foot away from each other. But at the speed the truck was moving it could not have possibly stopped so quickly. It would have skidded into Constantine's car. (00:35:00)
Other mistake: Everyone arrives on set at the same time but somehow Beast Boy goes and returns to the toilet within seconds.
Suggested correction: This is a case of cartoon logic at play, and therefore is not a mistake. Within seconds of Beast Boy going to and out of the bathroom most of the other Titans also somehow go in and do their thing and then leave the bathroom right after each other with no real time between. This is just part of the silly world of this cartoon.
Other mistake: When Vera returns to her house, a calendar with 2017 listed as the year can be seen on the wall. The present-day scenes take place in 2014, so there shouldn't be any reason for anyone to have a 2017 calendar. (00:56:55)