Do what I suggested. If any other esp is getting in the way, sending the animation esps to the bottom of your load order will make them trump whatever is interfering with them. Or it should. If you get them back, you can then bump them back up the list until things no longer work...again. Voila...your culprit exposed. If your animations are part of a merged esp or patch...separate them from the herd so they can be adjusted individually.
If that doesn't fix it...then indeed, something odd is happening.
Tip: if you're doing a lot of modding and such of your game, avoid throwing everything in the bashed patch. It does...or attempts to do...what more seasoned modders do in the Construction Set using the combine esp function. You're better off learning how to combine like esps yourself to save some room...then you have better control over conflicts. As well, I now only combine esps that do not have quests or excessive scripting...clothes/armor...for example. You have 255 esp slots available...might as well use 'em.
TESEdit is handy for discovering exactly what mods are affecting any given cell/item/animation/etc. Worth grabbing.