As we see Violet and Lily's first physical fight, they bump into a table with with wheels on the bottom of its legs and different colored ups sitting on top of it, and it rolls away and the cups fall over. Yet after they go into the kitchen and fight more and the camera goes back to Drake and Josh talking to Mary-Alice, Zigfee, and Trey, you can see the table in the background in it's original position, untouched.
The simians that the characters refer to as monkeys are actually chimpanzees.
Officer Gilbert says his name is Pierre. However, on both his door & his desk identifications, his name is spelled 'Perry'.