You also have to remember that the specific delivery person that you see is the face of the whole process of shipping from point A to point B. That driver has to hear complaints about every person who touched the package before him, which was a lot of people. It is possible that he knew it was an error by UPS, but he did not want to take the fall for it, did not want new uniform rules placed on his local group because another employee 2000 miles away who stole it, or it could even be that your area uses contracted UPS employees - which is becoming fairly common. At least you finally received your item.
"War protects the people from the corruption which an everlasting peace would bring upon it."