Floodlight Cam Detecting outside Zone

I got the floodlight cam plus and places it at the front door. Setting up the motion Zone I had expected that it will only detect motion within the custom zones created. However, it does not seem the device (Floodlight Cam plus) is getting the custom zone setting because it constantly getting trigger outside the zone. Which makes me think if the feature is only for marketing scheme to get people buying into the system.? Also whats the point of having this feature if it doesn’t work as it intended.? I had my custom zone setup towards my drive way and front lawn excluding sidewalks and the road. I even tried testing making the zone as small as possible and still it detects motion outside the zone. I searched on the topic and it seems this issue is know even with different devices. What do other people think is the custom motion zone just a marketing scheme or does it actually work.?