Revealing mistake: When Tom joins Sarah and Eliot for the kneeboarding, after Sarah apologizes for Tom's interrogation Eliot says, "It's okay, my dad would've done the same thing." Two shots later, as Tom grunts in the water, this shot is flipped - the driver is now on the left and the kids switched sides.
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Continuity mistake: After Tom reveals Sarah's interest in Eliot, when Lorraine walks by vowing never to help Sarah again, Bud holds a burger in his right hand and a plate with a hot dog on it in his left. Next shot he's eating a hot dog with his right hand, while holding a burger with his left.
Continuity mistake: When the Baker and Murtaugh family are at the Labor Day Cup, they are in the tie breaker round in their canoes. Bud realizes that Nora's water broke, and Tom stops paddling and stands up to yell at Jimmy Murtaugh to stop. But when the shot changes to Jimmy, Tom is sitting down paddling.
Continuity mistake: When Charlie and Lorraine arrive at the lake house, the twins, Kyle and Nigel, who are both wearing blue, along with the rest of the family, go down the stairs to greet them. When it cuts to the wide-shot of the house, Kyle and Nigel have vanished, while Jake and Mike are shown beginning to descend down the stairs twice between shots.