I suspect the same. Over the years I've gotten waves of bad and good and honestly the bad just seemed like someone not paying attention to how much of the pile

I suspect the same. Over the years I've gotten waves of bad and good and honestly the bad just seemed like someone not paying attention to how much of the pile they grabbed ;) If I got a bad delivery I got a lot of other people's mail, like someone not paying attention and just grabbing multiple addresses at once and tossing them in my mailbox.