Continuity mistake: When Thor is crossing the highway before the mall and drops the beer bottle, there are three vehicles approaching and relatively close to him: from left to right, a blue car, a white (or gray?) car, and a red pickup truck. When Thor goes back for the beer bottle, there are different cars approaching, and they are more distant than the previous ones. There is a white truck in the far left lane and a white car in the far right lane and two vehicles further back in between. Looking behind Thor, the cars that have just passed him are not the cars that were first shown. Next, the initial three vehicles (blue car on the left, etc.) are approaching again, are close to Thor, and then crash.
Continuity mistake: The position of Max's legs/feet change a few times when he is lying on his bed, varying with his dad entering his bedroom and leaving. Max's feet are in the air (perpendicular to the bed) right before his dad comes in but are crossed and flat against the pillow when he enters. When Max's dad rises from sitting on the bed, Max's feet are in the air again but are down on the pillow again when his dad is at the door leaving.
Continuity mistake: At the skate park, when Atticus asks Max and Thor if they want to see something, Atticus has three friends with him but only two of his friends show up in the woods where they sip a beer.
Continuity mistake: After Max's dad tells him he is grounded and the Good Boys fight/argue, Max walks away without his backpack (and the Drone's box, which would contain the recharging base, instructions, and warranty information?). A little later, Max is walking along the road with his backpack on.
Continuity mistake: During the lunch scene when Soren is asking Max to his kissing party, the background changes and the placement of the table in relation to the double doors varies. The kids sitting at the table and Max standing do not move. Sometimes the background (behind Soren) is a solid wall with posters and other times it appears to be the cafeteria counter with microwave ovens and/or available foods (e.g, oranges, ketchup, mustard). The table is perpendicular to the double doors but a little later the doors are at a slant.
Continuity mistake: At the sleepover (supposedly, Wednesday night), the Good Boys are supposed to go to the skate park the next day after school, but they are there before they are in school on Thursday.
Continuity mistake: When they are trying to pop Lucas' arm back into its socket he has a ball gag in his mouth. Watch, as the depth of him sucking on the ball gag changes. Sometimes it's near the front of his mouth, sometimes he has it almost completely swallowed.
Suggested correction: I rewatched the scene three times and I don't think it is a continuity mistake. It is true that sometimes the ball is mostly outside of the lips and other times it is mostly in the mouth. But there is a pattern - out, in, out, in, out. I get the impression that the depth of the ball in Lucas' mouth correlates with his breathing (inhaling or exhaling) and/or varies with his arm being pulled by Max and Thor. The ball goes lower in his mouth when Max and Thor start yanking.