I had a small item from Amazon that didn't show up even though the postal service claimed it was delivered. Amazon credited it back and I didn't reorder. About 3 months later it showed up. It was the original one and had the order date on it. I have gotten other people's mail in my box.
I had another that never arrived and the tracking showed it going to Sioux Falls South Dakota, then Fargo North Dakota, back to Sioux Falls, then to Duluth Minnesota, St.Paul Minnesota before finally getting to me 2 weeks after it was mailed. It had the correct address on the label and they had no explanation as to why it went where it did.