Floodlight cam false detection at night

Still figuring out this floodlight and app. I have the detection set to "people only". While its terribly slow to react when it does detect something, it works most of the time in daylight as I've been testing. From 12:59 to 1:37 AM the floodlight detected motion 14 times. None of the video's showed anything. Good thing I didn't have the phone in the bedroom, it would have woken me up for no reason. I know this floodlight picks up on people from a distance. In fact I am pretty happy with it's detection distance. Anyone walking up to the camera is caught from a decent distance away in my daytime tests, you simply cant sneak up on this camera easily. I know it wasn't anyone in a vehicle, that then got out, because we have driveway alarms that go off at both ends of the driveway and they were not triggered. Anyone know what could have triggered the camera 14 times in about 40 minutes yet record no human...when its set on people detection only?