Interesting comments from the Dragon, as always.
I must admit I found it quite disconcerting when I had the same thing the other way round recently. For the first time ever (over many flights) I had a set of cabin crew who, without invitation or question, addressed me throughout by my first name. This was in long-haul First Class and I am 40, not a kid, and it wasn't an Asian problem of taking the surname as the one that comes first. (Anyone like to guess the airline?)
I think it also depends on your upbringing. The old-fashioned English way of addressing "servants" by their first name never implied any undue familiarity. But culturally, in many northern European countries it is almost unheard of even to refer to close colleagues by their first names. It always amuses me when I'm in our office in Stuttgart that when colleagues talk amongst themselves in German they refer to "Herr Doktor Schmidt" and then in the next breath they will turn to me in English and talk about the same person as "Helmut".
Knowing (I think) your nationality, F40 (surely you must be F41 or even 42 by now?
), I think you are simply giving more evidence of this cultural difference.
On my favourite airline the Captain normally signs off by saying "I will leave you in the hands of your Inflight Service Manager Ann and her team". What I am always dying to know is: when he actually says "... ISM the lovely/delightful/gorgeous/beautiful/succulent [these guys get a little carried away sometimes] Ann ..." does that means he's already got something going there, or is he just making it clear that he'd like to have? Is there some sort of standard code here?
Frankly, amongst well-travelled people such things are all part of the joys of different cultures. Where difficulties are encountered I guess we normally just have to put it down to less well-travelled people going through a learning experience!