Continuity mistake: After Mikey pours dirt into the hole, he holds the bucket in his right hand, but it disappears in the next shot.
Continuity mistake: When Vince and Spinelli are talking in front of the bathroom doors, when Spinelli says, "How about you and me sneak out... just the two of us," the push plate is missing from the boys' bathroom door, then it reappears a shot later.
Other mistake: The Diggers start digging a hole in the Ashleys' clubhouse, then it cuts to a shot of Gus pouring out the dirt. In this shot, there is a circular object on the roof of the cafeteria building (presumably a satellite dish) that has been left uncoloured.
Continuity mistake: When the Diggers lift the treasure out of the hole, the handles on the sides of it are yellow. Then, when the kids start fighting over the treasure, the handles change to gray; then they are yellow again after Gretchen finishes reading the note.
Character mistake: Gretchen finds a note on the lid of the treasure chest and reads it. We see a close-up of the note in her hands. The problem is that what Gretchen reads is not entirely accurate to what is on the note, and the whole last half of what she reads is not even written on the note; it gets cut off at the bottom.
Other mistake: After the kids start fighting over the treasure, T.J. gives a speech to them. Then, when it cuts back to the other kids, Ashley T's socks are mistakenly coloured the same as her skin instead of green, as they should be. This error is shown again in the shot after the kids drop the treasure chest.
Other mistake: When the gang catches the Ashleys and Randall taking the treasure in the Ashleys' clubhouse, in the shot after Spinelli says, "Since when is Randall an Ashley?", the lines on the wall are mistakenly drawn over the plant in the background.
Continuity mistake: After the scene of Vince and Spinelli talking in front of the bathroom doors, it cuts to kids leaving the school, and the doors are left open after they all leave. Two shots later, they are suddenly closed. Doorknobs also appear on the doors, which weren't there before.
Continuity mistake: After the scene of Vince and Spinelli talking in front of the bathroom doors, it cuts to kids leaving the school, and Gretchen has her backpack on. In the next shot, it vanishes.
Other mistake: When Miss Finster drinks the cup of dirt and spits it out, her waistband is mistakenly coloured grey. Then, when we see her again a moment later, it is white again as it should be.
Other mistake: When we first see the gang inside the Ashley's clubhouse, in the shot after T.J. says, "Ladies, you have a deal," there is a big white line at the bottom of the screen behind the characters; the background seems to have been shifted up slightly in this shot.
Other mistake: When Miss Finster walks into Principal Prickly's office, her waistband is mistakenly coloured yellow, but when she starts to leave his office, it is white again as it should be.
Other mistake: When T.J. tells the gang that he is sure that the treasure will make them all millionaires, Gretchen's sash around her dress is mistakenly coloured blue, and in the next shot, it is pink again as it should be.
Continuity mistake: When T.J. runs out of the school with the history book, the book is red, but it changes to blue in the next shot, then back to red.
Other mistake: When T.J. discovers the directions to the treasure inside the old history book, Gretchen's left shoulder is going over T.J.'s desk, and there is a big white line going through the bottom of the desk. It seems as if T.J.'s desk has been shifted up slightly in this shot.
Other mistake: When Miss Grotke gets an old copy of the history book for T.J, she opens the cabinet and takes the book out. When she closes the cabinet, the knob moves higher on the cabinet door mid-shot.
Continuity mistake: When Miss Grotke gives T.J. an old copy of the history book, there are two kids sitting in the desks behind T.J., but they vanish two shots later.
Continuity mistake: At the start, the books that Miss Grotke gives to the class are red, but they all change to blue in the next shot.
Other mistake: When the gang enters the Ashleys' Clubhouse and catches the Ashleys and Randall taking the treasure, Ashley B's skirt is incorrectly coloured green. A second later, it is yellow again as it should be.
Continuity mistake: When The Library Kid speaks for the first time, you see a shot of the gang, T.J's hat and hair colour are mixed up.
