Just to be clear, does Dahua Enter&Exit means the object Enters AND Exits ("enters then exits") the intrusion zone before it triggers? Or does it mean trigger on any Enter OR Exit?
You can select if you want to trigger when something enters the box, exits the box, or "either" which is listed as "both" but that is meant to indicate both options (enter and exit) are active. Setting it to "both" doesn't require that a subject enter and exit before triggering.