Answered Motion?

I live on a fairly busy street. I just recently got my Ring. My peephole cam is recording city buses passing as motion and I've turned the motion down as much as possible. But a few things today had me concerned: • I had a package delivered to my front door, it wasn't recorded at all. No video of the delivery guy or the box being placed on my stoop. • I had video this afternoon labeled "answered motion" but there wasn't a ring of the bell & I didn't go to the door for anything Can someone help clear these up? Thanks