Deliberate mistake: After James and Kat enter Whipstaff and get the power turned on, when Kat heads to the staircase to go search for a bedroom, we can see a few of the metal stair runner rods attached to the stairs to keep the carpet runner in place. However, when James falls at the top of that staircase and gets rolled up in the carpet runner like a sushi, there are zero stair runner rods. (00:21:30 - 00:31:50)
Deliberate mistake: After Stinky delivers his "Smell-o-gram" to James, he trips over the vacuum and falls, then continues down the stairway, with his body rolled up in the stair runner as it gains momentum. The problem is when the sushi runner hits the ground floor, the runner's edge is facing the opposite way to what it should be; deliberately done for the momentum and to have it humorously unroll. It's entirely impossible for it to turn itself around and then still have even more momentum to unroll the way it does. (00:31:45)
Answer: When Carrigan tosses the Whipstaff documents into the fireplace, one paper's hidden message appears on the back from the heat (if using lemon juice instead of ink, messages stay hidden and only appear when heated); it has a drawn map and handwritten "Buccaneers and buried gold, Whipstaff doth a treasure hold." Later, Casper tells Kat that he and his dad had great fun together playing pirates down in the lab, and Casper quotes the words from their hidden "pirate" message. So the handwritten note with map was actually part of their father/son beloved pirate-playing shared fun (note when the living Casper appears at Kat's party, he wears a piratey costume with a sword at his side). The pirate "treasure chest" contents were merely Casper's personal treasure: his glove and cherished autographed baseball, and it was kept in the lab's vault; even after Casper succumbed to pneumonia, Mr. McFadden kept it in the vault.
Super Grover ★