Unity animation is adding some odd curves/movement to the object

So I have a modeling I'm animating using Forward Kinematics, when I raise the arm on on the X axis the arm will make some sort of loop movement while it moves. The object won't move straight up and the animation curves will go from a positive value to a negative on axis' that I haven't even touched. Attached is a video of the problem, anyone know of a solution?

Here is the video of the problem https://youtu.be/yQdwVFDme80