I have reached out to SkyBell a couple times on this for assistance and they have been awesome to explain how the motion detection works and why I have experienced certain things happening. My SkyBell device sits in a location that will not be able to see the person until they are practically right on top of it which makes things very tricky for motion detection compared to a standard porch where it can see someone approaching. The SkyBell works by detecting motion the first time, and then if it detects a second trip of the motion within X number of seconds it triggers the alert. Therefore, my front porch has the issue of people only being on my porch for a matter of seconds and being gone. Originally when I got the device I was only capturing anyone walking near it in a slow fashion and taking their time, however if someone was being fast such as the UPS man, it would often be triggered right at the time the person was leaving and I would just see someone exiting the frame. Since I started using the device in December, they have added “Motion Sensitivity” to the app low, medium, high and this has helped, however I still am hoping for being able to customize the amount of time between activities to warrant triggering a motion activity.