@Levans 

Hello, for the first one, could you please shot a short video and send it to us? Theoretically, the camera won't detect the things outside the activity zones. 

For the second one, may I know how far away between the car/passengers and the KC200? 

Have you ever tried to customize the sensitivity and recording motion last time? 

Good day. 

@Levans 

Hello, thanks for your valued reply. 

The camera can detect cars because it has larger size and the movement is much more conspicuous than the human. 

Besides, the activity zones means that the camera only detects the motion/sound that happened in the specific area, but you still can see the whole camera windows under liveview page. 

In general, the current issue is normal. If you do not want to get alerted by the car driving in the road, you can adjust the activity zones. 

May it help.