Try resetting the zones all together. Sometimes an update will mess with them
Don’t think of motion detection as if the camera is watching. The cameras detect motion via passive infrared. You need to think in a 2D plane, and understand that PIR works by detecting changes in heat, and interpreting that as motion. Things such as bright light, shadows, ect can trigger it, as well as reflected heat.
Make sure the camera is clear of any surfaces that the IR may bounce off of. Example, if you have a camera that faces the wall it’s mounted on, then it will reflect a large amount of IR back at the camera, causes issues.