This gets more and more confusing as I read it. So the latest response from the OP is now that somehow the second buyers PAYPAL verified address posted on the second buyers paypal account is actually the Washington address of the first buyer ? ? ? ?
Not possible imo. I was starting to think it was possible that Agon somehow had the mistakenly given buyer number two buyer number one's address- but its just not possible nor plausible that Paypal has an incorrect address listed and verified for buyer number two that out of 200 mm accounts just happens to be buyer number one's. Sorry. So the most likely scenario os that somehow when the OP printed the shipping label for buyer number two he accidentally reprinted the shipping label for buyer number one. Some variation on this is most likely what really happened imo.