It's "common knowledge" that each Pretty Cure series takes place in its own continuity. From my limited experience with the franchise I've already seen two contradictions with that idea.
- Kenta Hoshino, a supporting character in Splash Star, made an appearance in the previous series, Max Heart. He was even slightly younger in it.
- In both Splash Star and Heartcatch, Cures have been shown to be a long-standing order of warriors.
What's the official stance on continuity? Is this "common knowledge" based on official statements?