People only detected up cllose

I have my doorbell set to people only. I have the motion frequency set to frequently. The problem I have is that I only get notifications & alerts when the person is right at my door. I can not see where they came from or anyone in front of my house. I tried changing it to see if turning the people only off but then I was getting alerts for every car going by and not seeing motion in my yard. Anyone know of a way to fix this?