Doubt it was the kid, the ones going around selling things aren't really the type. It's a pain to go door-to-door, last thing I'd think he'd want to do is cause trouble. UPS is great at losing things and mis-delivering them.
Just got a UPS package on my doorstep. Address 1648 apt#1226. They delivered to me at 1644 apt#1126. Not the right building, not the right apt. There was a 1126 written in red sharpie on one side of the box, 1226 on another side, and 8445 somewhere else. WTF.