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When Sarah and Olga have their little squabble and are poking their tongues out at each other, it comes off a bit Narmy. But then, take into account that before Executive Meddling occurred, Argento was going to have his characters around the age of 12, and it becomes a lot more fitting.
The third film reveals that evil witches are cannibals. Knowing this, Madame Blanc's attributing the rain of maggots to "spoiled food" makes more sense.