Okay, so, turns out UPS was never here.
I looked out the door and thought I saw the brown corner of the truck, just visible over a line of cars. The door is at a low point, the cars in the near spaces are a high point, and the driveway beyond is another low point. Also, I have 20/70 vision, looking at an object 80-100 feet from me.
What I actually saw was the dumpster, just visible over a line of cars, 120-130 feet away.