Motion sensor

I've just purchased the ring stick cam battery... I've managed to set it all up when I try and set up the motion detection setup it will only let me select half of the garden... I've also got the ring stick up cam plug-in and that lets me select the whole garden in motion detection... Anybody no way it is only letting me select half the garden in the motion detection settings on the ring stick up cam battery... Any help would be a much appreciated