I ordered something yesterday from Amazon. I do not have Prime and opted for free 5 day. They emailed it was shipped then emailed it would come the next day. I got a delivery email an hour ago and it was not on my porch. I looked over the street and saw a delivery on neighbor's porch and thought it might be mine and went to investigate. Turned out there were two packages for him marked Prime. I found my package in my mailbox with no Prime marking. It should not have been delivered there as I had outgoing mail and mailman just came after I removed Amazon package.
I suspect that Amazon had a Prime delivery for my neighbor and since I ordered at the same time they put both on the Prime truck. This is the second time that this has happened.