Pooh's Double Trouble / Eeyore Sleeps on It - S1-E19
Factual error: The letters and symbols on the characters' reflections in the mirror look like their regular counterparts, when they're supposed to be in reverse.
The Crazy Ten Minute Sale - S1-E1
Factual error: When we see Gigi and her gang walking down the hallway, their hair is blowing backwards behind them. Yet the fan is in the wrong position (behind them) and therefore their hair should be blowing forward.
Factual error: "IParty with Victorious" is shown after the episode "iOMG". The thing is, anything that happened in "iOMG" never happened in the episode "IParty with Victorious". "IParty with Victorious" should have been shown first, not "iOMG".