Makes you wonder if anyone at the USPS sorting and delivery facilities pays any attention to the labeling. Since most of the sorting is automated, one might think this shouldn't happen. I think we know the answers.Had that happen once. I used Priority Mail for one large envelope and Priority Mail Express for a second one to addresses very close to each other in the Cleveland/Akron area. The Priority Mail got there first. The Express one was two days late. Hard to figure. Both went through a lot of the same facilities, according to tracking, until the delivery post office. But the Express one was delayed at every step--even though they were mailed from the same office at the same time.