Before it gets even more unfortunate, however, can I ask if you are the same person who posted this on another site?
Amazingly, anytime you experience a funny issue with Patek, he simultaneously runs into the exact same problem! You seem even more out of luck though, since now he wants to buy a 5164 worrying about potential problems with pushers...while you bought your 5164 with stiff pushers a year ago! Perhaps he's planning to make you an offer? ;-)
Thanks for clearing this up for us, I'm sure it's just a coincidence... If the two of you live close to each other, I think you should definitely meet one day! ;-)