Animation pose doesn't stay

Hi, I made an animation for a proposal HUD, it is actually 3 animations controlled by a script. When it get to the last animation which is looped, the avaitar's head and hand start wandering around after a short period. Is there something I an do to control it? I loaded the animation up as a high priority and made sure the arm and head movements were part of the animation, not just left to go free.

I used Avimator to make the animation. Thanks for any help

Check to make sure you moved the hand and the neck in that last animation.

It could be the chest or abdomen joints that are causing the movement - you need to check that all the joints that can affect the head and hand are rotated slightly on Frame 2 - check the neck, collar, shoulder, forearm, chest and abdomen joints.