Amazon's new own delivery service is AMZL_US, and it's terrible.
The problem is localized to whoever Amazon hired to deliver their packages in your area. Quite literally it is a average person carting Amazon packages in their own car. I have seen one driver pull up in a beat up Honda, filled to the brim with packages, and with his mother manning the GPS. Nothing wrong with it (except security), but some of these people scan items as delivered to meet a delivery quota, mainly because they can't make it in time (before 8-9pm). They will scan it as delivered and either deliver it very very late (> 8pm) or early next morning. Its something Amazon is aware of, let them know you are having a problem if its happening more often than usual.
https://www.reddit.com/r/amazon/comm...livery_issues/
Seems like Amazon is now using some Uber / 1099 contracting business model to deliver packages?