appearance.2da (rather than creatures.2da).
Might want to check on the MODELTYPE column entry. I've had "stiff" creatures before because the wrong type was entered (S instead of F, or F instead of S).
Checking myself, and...we may have a CEP issue.
Looks like the supermodel (c_ogreA, listed as "Ogre 1" in the toolset with CEP) uses a L type entry (large), while that troll itself was given a S (simple) entry. I've never used that particular appearance myself, so I'd not noticed an animation issue.
If anyone has time to check actually changing the MODELTYPE for that troll appearance to L and testing it in-game, I'd appreciate it (I've got things a family thing to do tonight that starts in a few minutes). It's at line 2500.