Question Animation N00b needs help

So I got a character from Character Creator.
I got animations for body motion.
I got facial animations driving the SkinnedMeshRenderer blendshapes and SOME of the bones in the head. The rest is reset to T-Pose.

Now how do I combine these so that, for example, the character walks, and at the same time looks angry?

Every time I try to trigger the facial animation (that only contains the keyframes for blendshapes) it resets the rig to this:



Every time I trigger the facial animation (that contains keyframes for both blendshapes and bones) it sets the rig to a T-Pose (but with working facial expression and head movement).



Any pointers would be greatly appreciated.