Animating feet seperately from the body

I have a character and I would like to animate a walking animation for it. However i get the following result when I animate it: (ignore the green lines/ markers/ sound) As you can see the foot animation is also being applied to the character with predictably bad results. I currently have one animation which applies to the entire character which the foot is a part of. This animation has two layers and can be seen here: The real problem I am having is how does one get an animation to only apply to a section of the character? I know this can be accomplished with avatar masks but i believe those are only for 3d animations/projects (this is 2d) but if you can get this to work with 2d animations please explain.

The animation that I am using just changes positions, and rotations which is unfortunately applying to the entire object. It also should change the sprite of the feet however this is not taking effect. Ignore the fact that there is only one foot, the other was disabled but exhibits the same behaviour as is seen in the shown foot.