GMT Marster ii 16710n please help

[Jim g]

Hi All,
I would like to introduce myself to you all as I’m new to the Rolex forum as I have just perchased a GMT Master 16710n 1999 to my collection of watches, I have a question to ask and I hope you don’t mind.
I brought the watch from a reputable jewellers last Thursday and I have noticed that the hour hand whilst setting the GMT function doesn’t move only the date so it’s impossible to set the time for another time zone, is this problem common on these watches or after reading up about this it could be that the movement isn’t a Rolex 3168? The watch is covered under warranty for a year from the shop I brought it from so I’m covered on that front.
Also if I was to take the watch to a Rolex shop is this something the could fix in the short term without sending it away to Rolex to be serviced as I am currently working on a super yacht and I won’t be returning to the uk until next year.
Any advice would be greatly appreciated and thank you for your time.
Many kind regards James
Ps I love this watch and I’m very happy with it on my wrist it looks amazing