@Wayne-TP 

Hello!
Hypothetical situation: in the "viewing range" of a camera, at least 2 "intruders" enter simultaneously (a person and an animal/dog). If both move in the same direction, the camera follows the movement of the two and maybe in certain situations, manages to identify them (the person, respectively the animal; although usually I only received a movement message...). But in the situation where they move in different directions, the decision to follow an "intruder" is purely random. (I have had situations where the animal followed, "leaving the person unattended". 
I tried to change the sensitivity differently, for each, hoping that this way, the camera can "decide" who to follow (but it had no effect).
I know, I'm asking too much from an entry level camera..... 
Thank you!