I think I know what your problem is I had the same one few months ago.
heres wat you gotta do, right click on the face model that has the head control to it. while holding the right mouse button go to inputs>all inputs. then youll get a window with all the inputs on it. select the one that says something like blendshape , middle click it and drag to the bottom I think or right above the last input. the thing is I'm not on my homecomputer and I cant exactly recall the buttons but try that out and you can then move the head while having the blends work accordingly.