Other mistake: Robbie gives Tori a chocolate leaf-blower as a present to cheer her up. Then when Robbie leaves to go join Cat at the Platinum Music Awards, he supposedly takes his chocolate leaf-blower present with him. But, in the shot where he leaves Tori's house, the bag that the chocolate leaf-blower was in is still on the floor.
Other mistake: When PJ tells Gabe about the attic, he said he had never heard of the attic. But in the earlier episode "Charlie Shakes It Up" Amy tells Gabe to clean out the attic while she's away.
Speeding Is Dangerous - S1-E22
Other mistake: When Shine says, "I think I'm OK," his front tire is layered over the railway tracks.