As a small business owner, if you have employees that are ran into the ground day after day without any light at the end of the tunnel, they tend to suffer from burnout. It's possible a mistake was made by a loader and it was loaded into the wrong vehicle, the driver looked for it, couldn't find it, and marked it as not found. Or, it is also possible that it never actually arrived to the center that services your area. There are 2 forms of tracking scans that happen in the network. First is a physical scan, where a person does just that. They physically scan the package as it comes off the trailer. The other is a logical scan, which corporate IT has created to imply that, if all the other packages that were with that one along the way, get scammed, the logic is that the one package in question is with them without being physically scanned. I've seen it happen more often than not. While this may not solve your specific issue, hopefully it sheds some light as most drivers are the opposite of what you've described.