Other mistake: At the beginning, when everyone is watching Shelby fighting on TV, the timer is going too slow. According to the timer, the fight ends at 2:53, which is only 7 seconds of fighting, yet the fight was way longer than that.
Continuity mistake: When the gang is at their apartment watching the news over how they think Carly pushed Shelby's grandmother down, there is a ladder outside their door that appears and disappears from shot to shot.
When Carly and the team are facing the professional Chef, Carly says, "Add the Peruvian Puff Peppers." This pepper is also mentioned in "Drake and Josh", but in "Drake and Josh" it was illegal in the United States.