Other mistake: Public schools also have dress codes for faculty/staff, and female employees should not wear anything too "revealing", such as showing cleavage. Trey showed Donnie a photo he took of a teacher, saying that he got "a nice shot of Miss Bell's cleavage." A teacher would not be likely to wear what she had on - the "cleavage" would be considered, at minimum, "disruptive" to the learning environment (especially to high school boys). (00:14:54)
Other mistake: Public schools have dress codes, though they have become more liberal (lax). One thing that continues to be prohibited is the rule against wearing "revealing" clothing. Kaitlyn is wearing a blazer over her quite "revealing" low V-necked top, but the design of the blazer doesn't make it very useful for her to "cover up" and be in compliance; she would likely be sent to the office (not class) until she finds something more appropriate, which may entail having her parent bring a suitable top. (00:16:03)
Other mistake: When the blue van rolls over, and they turn around to go pick them up, they park like 20-30 feet from the van for no reason, instead of right by it, seemingly just to have a tree block their path, then decide to run into a church with really big stained glass window and wood pews while a fire tornado is just outside. Rolling the van back upright, all the TVs and equipment inside the van seem to be working just fine.
Other mistake: They had two cameramen, one meteorologist, and one driver who ran the imax camera. One camera man dies before they get in the church then when they talk about why he died you see another camera man or crew member holding a camera. He's seen twice then never seen again.
Suggested correction: Lucas, the 3rd cameraman, is in the background throughout (or we're seeing through his camera). He goes with Allison and the others after the church (Pete: "Suit yourself"); he gets out when they reach the industrial park, but is filming instead of helping rescue Donnie and Kaitlyn; he's behind Pete when they're all crammed in the Titus; he gets back in the Titus with Pete at the school (Pete: "Lucas, you getting this?"); and he's there in the storm drain and when they come out at the end.