Because it doesn't seem normal that's why...
The issue is, why it doesn't seem normal ? Would you have preferred a single variant instead ? GSX always worked like that, for all its vehicles, there are many different Pushback models, many different Baggage cart trucks, etc. If several vehicle models are SUITABLE (placing an emphasis on it, which mean they are *all* proper for that airplane), not having all the same kind seemed to be an added value.
I wanted to post actual pictures of what I experienced and wanted to know if anyone else experienced this, and if this was normal or not.
It's normal, of course, but you called it "a problem" before hearing any explanation. The issue is, in the 4+ years since GSX was released (and it always worked like that), nobody ever complained about this, it never occurred that, having a variety of vehicles, would be seen as a problem by anyone.
I would think that the boarding ladder that comes up is what will appear each and every time. None of this "switching ladder models" or switcheroo of ladder models was mentioned in your manual.
See above. Nobody ever noticed it or complained about it so, we never thought that should have been explained explicitly. It IS explained a bit in the PaintKit manual.
Hint: even the Marshaller sometimes is a white guy, sometimes is a black guy. I really hope this is not a problem for you too...
Other Aircraft that I customize, the same model boarding ladder usually appears.
That's because on other airplanes, there were less SUITABLE models, or possibly even just one, depending on the door's height. Suitable is really the key word here.
After I configure a specific aircraft with ladders and other ground support equipment, I would expecting more consistency of equipment models whenever I execute the unboard/board passengers command.
Your question might have been look better if you said something like:
"It would be nice if we could have the option to customize even the *model* of a vehicle, in addition to the operator, for each airport/parking"
And to that, I would replied that yes, something like that might be possible, to a point, but it would create a whole new sort of problems because, opposite to the livery, which are available for each vehicle variant, what happens if you customized a specific airport/parking should use only a specific kind of stairs (for example), and then you would go there with an airplane they couldn't use, because the doors were either too high or too low for that stairs ? Revering back to the random choice, so you would be even more confused the "wrong" vehicle would appear, instead of the one you chose ?
And what about the other vehicles ? If stairs could be customized, why not the Pushback truck or the Baggage cart truck ? And why leaving the marshaller out ? Or the model used by the Catering truck or the Passenger bus. Offering all these choices would make the parking customization so complex, that nobody will want to use it.
So, GSX selects several things randomly, but with parameters that drive the choice in order to be sure they are plausible, for the airplane configuration.