Setting motion detection zone

So I frame my camera to the exact position I’d like it to monitor, then I turn on motion detection. The camera stays exactly where I set it. Then I attempt to turn off full screen motion detection so I can set a motion detection zone. As soon as I do that the camera moves from the position that I set up. In the zone setting I have the ability to move the camera with the button interface which doesn’t allow me to get to the position I would like. When I try to gesturaly move the camera with my finger it does nothing. It only allow me to set the detection zone box