one opening can have many names; one name can be given to many openings
Two Hippo Defenses?? Or chess.com error with the Hippo Defense "1. ... Nh6"??

When white the Krazy Kat System/Opening is 1 Nh3 2 f3 3 Nf2. When black maybe the Krazy Kat Defense would be a better name?

When white the Krazy Kat System/Opening is 1 Nh3 2 f3 3 Nf2. When black maybe the Krazy Kat Defense would be a better name?
When Black does this, it's actually called "Arctic Defense, Drunken Knight Variation" (https://www.chess.com/openings/Reti-Opening-Arctic-Defense-Drunken-Knight-Variation).
I've recently learned about the Hippo Defense system (https://en.wikipedia.org/wiki/Hippopotamus_Defence), only to discover in chess.com's opening explorer a totally different kind of Hippo Defense (https://www.chess.com/openings/Kings-Pawn-Opening-Hippopotamus-Defense).
What's going on here?? I know for sure that the first one is actually called the Hippo Defense, and I've heard an alternate name for the second as the "Wild Bull Defense". Is chess.com wrong, or are there actually multiple Hippo Defenses?