Sensitivity of Doorbell 2

Ive purchased a ring doorbell 2 and have played around with settings but not gettiny very far. The doorbell works but it doesnt seem to pick up anyone until theyre half way up drive. Doesnt pick up movrment at bottom of garden and yet it picks up cars driving past having turned around in cul de sac. Ive got it on highest sensitivity and frequency but it seems to lag if that makes sense. I dont have the wedge mount fitted but wouldnt say its that much of a slope and as mentioned it picks up cars coming from right to left but not left to right.....