Camera not recording delivery to front porch

Get clips of squirrels and birds that stop in the front porch area but had a delivery to the front porch today, in the snow, that was missed by the camera. 

I have motion set to high, sound set to normal, all notification periods.. yet it missed the delivery.   Would have thought a human being, carrying a large package, would have tripped the camer's action. 

 

Am I doing something wrong?   Must I setup all day recording to not miss events such as these?

 

Thank you,

Steve