A bit confused

mm1988:

Franglais:
Two separate things?

Door open…normal-ish.

Package left on step. Unusual, but maybe the driver next to you put it down, got distracted, and…■■ Dunno.
But not necessarily related to open door.

I did wonder if a driver forgot to pick it up. I was the only one in there overnight but someone could’ve stopped for a break.

Someone misplaced/lost it, then some kind person found it & assumed as you were the only person there (at the time they found it) that it most likely belonged to you.