Door bell 2 and cctv stick up camers

First. Door bell. - When people pass motion comes after event, I entered but it didn't notify until 3 or 4 minutes later also some time it shows nothing. Second cctv - This related to door bell as well when I look for recording on the cctv and then check the door bell nothing is there. Problem cctv mains operated motion set to end of cul-du-sack, when cars come into the cul du sack to the end of it there is nothing there this is to do with a silver car where I want to see who comes out of the next minute its parked did not see it coming in and not seen who has come out of it. I see other cars coming in and across the back you can see the cars this is set to record all the time when I go back to view to see when it came init dose not show this,this is between 3-5pm How can I fix this. Thanks Anna