Animation looks different in Animation Tree than Animation Player

Hey all,

I'm fairly new to Godot development, and I'm having an issue in the AnimationTree.

For reference, here is the animation in the editor:

And here it is in the animation tree:

Please note that I am altering the position, rotation and scale of the arm. This is for mechanical purposes that will implemented later.

I am also getting this error whenever I play in the AnimationTree, it may be relevant:
"scene/animation/animation_tree.cpp:850 - Value track: RightArm:rotation with different update modes are blended. Blending prioritizes Discrete mode, so other update mode tracks will not be blended. (User)"

Thoughts? I can't figure this one out.