Animation Importing Incorrectly?

What could be causing this? I’ve tried exporting the very same animation from UE4 and tried importing it back into Max and it still looks correct in Max. Any ideas?

View from Max 2016:

View from Persona 4.16:

UPDATE:
the model I appear to be creating animations on is incorrect. I just exported the skeletal mesh and imported it into 3ds Max and was animating on that model. Upon exporting a correct looking animation out of UE4 and applying it to that model in 3ds max I get this result.

A pose that looks correct in UE4:

What that pose looks like imported on the skeletal mesh in Max 2016:

Is there some sort of bug with exporting the base skeletal mesh and importing it into 3ds Max? I can animate the bones just fine and they look correct in UE4 but working with the janky model in 3ds Max is too unwieldy. Any suggestions?

Another Update, the max model’s shoulder looks like it’s snapping to the upperarm_twists ? Why would it be doing that? Also why would it be doing that and look fine in UE4?