Postal Locations

My wife (Tami) was expecting a package as of 10/6/17. As of 10/17/17, the package had not arrived... even though the tracking history - #9405510201039022788073 indicated it was delivered to our mailbox on the 6th. I called both Clarkston and later Lewiston Post Offices to find out what the problem was. Customer service was helpful by phone at both locations. The Lewiston office took my name and phone # and told me they would look into the issue. Amazingly, the package that was missing arrived at our front door (delivered by our postal carrier) the afternoon of 10/18/17... 12 days later than the tracking history indicated it had been delivered. The package was crushed when it arrived at our front door. What happened? We would like answers.