When Mitch, Hobie and Irene are first perusing the lifeguard scrapbook, they stop on a certain page. When Mitch closes the book, it's on a different page than they were looking at.
At the start of Logan's flashback, he says to his father, "Daddy, Daddy, wait for me! Can I come with?" In the present, he only repeats back, "Daddy, Daddy, can I come with?"
In Logan's flashback, he is driving on the beach with his father in Australia. The car his father is driving has the steering wheel on the left-hand side of the car. In Australia, the steering wheel would be on the right-hand side of the car.
The "baby" Mitch rescues from the burning boat is obviously a doll; a featureless face and synthetic hair are even briefly visible in one shot.
When Matt calls his dad to wish him a happy Father's Day, he speaks French with his dad and English with his mom, but it's his mom who's French, not his dad.