How do you know if the Ring 2 is just broken?

I have purchased a Ring 2. I have installed it at my front door which is facing south. My front door is nearly 30 feet from the residential road. I have set the motion detection manually and via the wizzard. Unfortunetly, even with the blue halo down below the road I am getting motion alarms when cars drive by. I have ended up putting the motion filter (the blue halo) nearly to the bottom. And I am still getting motion alarm (although there are less of them). I thought that maybe the sun placemement might have something to do with it but I get them during cloudy days.I do not want to turn off the motion alarm as that is a lot of why I got this. I have found now that there are so many false alarms that we don't even check them any more. Then I have to ask myself why do I even have this? If the motion alarms are this bad then I may just have to send this back. But surely this device cannot suck this bad! I am really wondering if it is broken. Any advice?