I moved here in April of '13. 6 months before I paid for the calendars. After 4 months of dealing with lawyers, banks, notaries, real estate agents, surveying companies & home inspectors, I think I'd know the address of the house I bought.
This info was supplied to you when I paid for the calendars in October of 2013. You never checked that. You saw my name on the list & sent them out to my former address, without reading the attached PM.
As far as the post office screwing this up? Well, the 2013 calendars was probably an honest mistake on their part. But, according to you, they've made that mistake 3 more times! That, sir, is highly unlikely! The odds of that happening are infinitesimal. Do you really think that the Post Service would still be in business after 150+ years, maintaining a level of incompetency such as you've suggested?