Modifiying Anchor Points

I have a still image of a person in the time line which I need to zoom to the face during a part of the video, not the center of the picture which is the default position of the anchor point.

If I move the anchor point by moving the anchor point H and V sliders, the anchor point continues to remain in the center of the frame while the entire picture moves downward to allow the anchor point to be centered to the face. This off-sets the entire picture in the frame which is not acceptable and can't be the way the effect works. Unfortunately, I can't figure out how to get around this.

At the begining an throughtout the zoom, the picture must remain centered in the frame but moving the anchor point per the hlep file moves the entire picture downward.

What am I doing incorrectly? Can someone please assist?

Thanks!!