Custom unity Animation wont work properly (adding avatar to animation?)

Hey so i have a character and im using imported animations which are rigged and setup with my character and that works fine.

But i need to add an additive leaning animation.

i made some lean animations in unity's animation window but if i make its Blending option additive it doesnt do anything. if its over ride how ever it works(i CANT have it override because i have other animations on the spine which is where the lean animations are)

i THINK the problem is the Avatar. when i import my models and animations it makes an avatar but when i create an animation in unity there is no avatar. i tested this by applying a random additive animation that had an avatar to my character and it worked great. Also in the animation window an imported animation looks different to an animation i made in the animation window

so i think my question is how do i use my characters avatar and apply it to an animation i made in unity's animation window.

Thanks ~Scott