My first Rolex service centre experiance

[T5AUS]

I was in Sydney last week working and thought I would take my vinatage 16750 GMT in to the Rolex service centre there for a service since it gains about a couple of minutes a week. I dropped it in on Monday for a quote telling the charming young lass in reception that I only wanted the movement cleaned and regulated and did not want the hands, dial or bezel replacing. I went back on Tuesday to see what they thought and was given a written quote which came to a staggering 1,314.50 Au.!!
They had totally ignored my request about me wanting to keep the original hands, dial and bezel and insisted that if I went ahead with the service it would only be done if the hands and bezel were replaced but I did have the option to keep the original dial although they didn't recommend it, which would save me $341.00 Au. and thus bring the price down to a mere $973.00 for the service. They insisted that the hands had cracked lume and that it could drop out during service, perhaps it could, but I was happy to take that risk. To me the bezel is fine, I can replace that myself when I locate a good original one of the period.
Needless to say, I declined to leave it for a service and was glad to be on my way with my baby back on my wrist.
(but wait, there is more)
The following morning in my hotel I noticed my watch hands were out of sync.!, (see pic) when the hour hand was on the hour, the minute hand was down at the half hour mark, not on the hour, ahhhh, what had happened.
I took it straight back to the service centre to see what they thought might have happened, all very odd. The service guy who actually did the quote said via the receptionist that it was nothing to do with him, all they do when doing a quote is to take the back off just to see the movement. I could not believe it, it was just too much of a coincidence, my watch had been working perfectly up to this point then straight after the quote it's wrong, very strange. I asked to speak with the technician, I needed to hear it from his mouth, and that's exactly what he told me, it could not have happened here.
By this time, we were all getting a bit excited so it was decided to send for the boss!! A nice enough lad, he explained to me exactly as the other guy had, no way it could have happened here, they don't touch the hands when quoting, just take the back off to examine it, you must have bumped it. So that was that, what could I say. He said as a show of good faith he would sort the hands out for me for $50.00 which I agreed to, accepting that I must have bumped it, cant possibly imagine what I did to cause them to jump out of sync. guess it WAS just a coincidence, it certainly left an odd feeling in my gut for my first ever visit to a Rolex service department though. I finally received my watch back the next day, hands all back as they should be and it's still going fine.
Just wondering if anyone else has experienced their GMT hands jumping out of sync, how common a problem is this?