Doorbell poor detection

Hi,Ive installed a ring doorbel gen2 and not able to get it to detect motion until very close to the doorbell. It is located at the top of 4 steps so around 7foot from ground level. After initially struggling to get it to detect i have added 2 wedges but this has not improved the situation. In the attached image, I have walked from the far end of the drive an was not detected until where you see me in the image. Sensitivity is at max and the detection zones cover the driveway.Can anyone shed some light on this as im really at a loss as to what to try...