Doorbell activity zone doesn't work properly

I set my activity zone to the end of my lawn to sense all motion (not including the road) but every time a car drives by it activates an alert.
On the flip side my lawn guy was able to cut my lawn this Friday + use his blower right up to my door but that didn’t set-off the alert??
Then I finally tried to set a delay for When I leave the house to walk my dog… but it’s still alerting me every time I leave the house