Motion problems with Floodlight cam

Hi all, New Ring user and have just had a Floodlight cam installed on my front driveway, along some others. I’m having big problems with this driveway camera.. I’m on a main road and have it installed over a tiled bay window so part of the view is of the tiles. In the evening just as it’s got dark it’s busy with cars. During this time, both the motion detection notifications and light go on constantly from what I can only think is reflections off the tiles and side of my car of car headlights. I’ve dialled the motion zone/sensitivity right to the lowest and the motion light right back to the lowest in only the straight ahead area and still get the problem. To make it worse, I literally drove my own car onto the drive yesterday and the light didn’t even come on! Any ideas? Is it the positioning of camera? Thinking it might possibly help if I bring it down lower to the side of the bay window rather than directly above higher? Thanks