Not recording deliveries at doorway

It's been two or three weeks. I've had deliveries of groceries, packages, and fast food. The camera has failed to capture all the events, but always manages to record me retrieving the delivery and cars driving up and down the street at all times of the day and night. Never the delivery vehicle, delivery person or the items. The camera is set to Frequently, which obviously it does ...just not the events of someone pulling up to the curb in front of my house, walking up my driveway and standing in front of my door while dropping off packages, bags of groceries or dinner. I've bought a different brand of outdoor security cameras with the hope between the two any future deliveries will be captured.