Nice response from AL-KO, NOT!
I wonder if the rubber "spings" inside that axle end just wore out? I never could understand how they wouldn't wear and put the tires out of alignment.
Of course we have no choice if we want a particular camper, we get what they provide.
We have 4000 lb axles, which I also consider a bit light. I doubt that we're overloaded, but there isn't much spare capacity.
I imagine one day we will be upgrading as well.
Good luck with the alignment!