Continuity mistake: When Tucker, Alan and Benny ambush the Brookdale boy, Alan is sitting on top of the Brookie pining him down. When the angle changes Alan is sitting beside the Brookie - he has not had time to move.
Episode #2.2 - S2-E2
Continuity mistake: When Andrew and Justin are walking home a white car on the road behind them slows down to go through the width restriction and then disappears, as it does not drive past them when the angle changes, and there was nowhere else for it to go.
Episode #1.1 - S1-E1
Continuity mistake: When Ann Wilson is asking Jackie Heron for directions, the position of Ann's hair changes between shots. When seen from her front Ann's hair is behind her ears, but when viewed from behind Ann's hair is covering her ears.
Continuity mistake: Robyn celebrates her birthday in episode 12, and as she's in year 10, that would make her 15. However, when she runs away in episode 14, her age is said to be 14.