UNIT - Creature Balance + Visual Changes

Centaur, level 3

Maybe you're playing a mod where they've been moved to level 3, but in the original game, they're level 2.
Oh, yes, in the UNIT file itself, they've been moved to level 3. Okay, then it's clear what the problem is. As I understand it, there's also a separate level-up table that exists independently of the UNIT file, and it seems the author didn't synchronize their changes with it.