Continuity mistake: After the teens parked their vehicles facing an embankment (which was about twice as high as the vehicles' roofs), they walked up the hill to the diner (which wasn't visible). Somehow, one of the teens sitting in the diner was able to see James' SUV being stolen, so they ran outside and down the embankment. The vehicles should not have been visible from inside the diner plus the embankment looked different (e.g, varying heights). (00:07:26 - 00:12:24)
Factual error: The owl that JP was looking at made a "who who" sound. The owl may appear to be a Snowy Owl (one many people are familiar with), but it is a Barn Owl. Barn owls are not "true" owls and it is the true owls who "give a hoot." Barn owls don't hoot; they make a screeching or squealing sound which can be piercing (and eerie to some people). (00:32:50)
Deliberate mistake: The number of clicks (sounds) Christine made on the "text to talk" device did not match the total characters she typed. With few exceptions, there were a lot less clicks/sounds than there should have been based on the amount of letters/words she typed. (00:06:40 - 00:15:30)
Continuity mistake: The amount of wine in Annie's glass (as well as Nic's) decreases then increases without her adding any. Annie had almost one-half a glass of wine when she poured some into Nic's glass, then it was closer to one-fourth full. A little later, Annie's glass appeared to have the amount she initially had when she approached Nic. (00:13:59)
Factual error: Rose's legs were paralyzed, but when she was dragging herself on the floor, she occasionally used her feet to help propel her body forward (and moved her feet downward) - something she would not be able to do if her legs were paralyzed. (00:33:40)
Continuity mistake: While driving to Harper's house, Jordan did not have the sun visor down, but it was down when she was backing up after she passed Harper's house, #237. The sun visor was not down when Jordan was going down the driveway to the house. (00:17:15)
Continuity mistake: The position of Esther's bag on her bed changed, going from a few inches away from the foot of the bed to one corner of the bag almost touching the end of the bed. (00:29:30)
Continuity mistake: The protagonist is puzzled by the sight of many people looking at the sky. When she decides to pull over and figure out the reason, the kids that were playing soccer in the lawn have changed position between shots. A much bigger inconsistency happens a minute later, when the eclipse obscures the sky (with a rather lo-tech effect that borders on being a revealing mistake itself), the kids have stopped playing ball, but in a longshot they are still shown playing. (00:03:00 - 00:04:15)
Other mistake: When Tess says good night to Keith, the lights in the bedroom are on, but the switch is down (off position) but when she wakes up in the middle of the night, the lights are off and the switch is still down. We see a lamp on the same side as the switch but even if she turned it off manually, being plugged into that AC outlet would mean the lamp would probably be off based on the switch. If the switch was up in both shots, it would be different.
Suggested correction: The light switch by the door controls the ceiling light. When she says goodnight, the side lights are on, but not the ceiling light (the switch is off). When she wakes up, the ceiling light is still off, and so is the switch.
Revealing mistake: The views to the right and left of the truck on the road did not flow in the manner expected if they were actually there (as opposed to using a green screen). Also, as soon as a "stop" sign could be seen to the right, the camera shifted to the driver, who kept driving as though the stop sign was not there. The structures to the right of the truck were blue but became white when the camera shifted to a front view (not using a green screen). (00:01:20)
Continuity mistake: The monkey figurines (or charms) on the beads hanging from the rearview mirror change positions from being more horizontal (side-by-side) to vertical (one below the other, and at different distances). Swaying from the SUV's movement might explain some change, but the weight of the monkeys should have kept their positions more balanced (side-by-side or one at the top and the other at the bottom). (00:03:30)