Before you call out your vendors for scamming, beat up your mailman, or (god forbid) quit using DNM:
USPS is notorious for marking packages delivered when they are not. Sometimes it automatically marks delivered on the date that it was anticipated to be delivered. Sometimes the people running your building's mailroom are illiterate and can't read mailbox numbers.
In any case, I was about to flip the fuck out because I hadn't received a packaged that was marked delivered, and a few days later it just showed up randomly. Happy days.
I have not had a usps tracking marked as delivered and it not being delivered yet. maybe I am just lucky?