On my oldest toon the "Mastery One" weapon style is not saving on any armory after logging in and out, or switching characters. I use 2 handed and dual wield, with bow as the cross weapon that I combo into, and the style I pick for the bow, no matter how many times or ways I try imprinting onto an armory never persists after reloading the character.
But this has nothing to do with the armory (and that's why the devs probably don't get the error).
Try the following:
- Save weapon style, materials, etc
- Log out or go to the character selection screen
- Now log in again and you will notice that weapon combo styles 1 and 2 have been reset to a different style.
AND NOW THE MOST IMPORTANT!
Now set the weapon style and the materials again and save them in the menu (NOT in the armory!).
Now just switch your armories and you will notice that the style remains even though you have NOT saved it to the armory again.
Conclusion: The problem is not related to the armory, but it is due to the fact that the style is reset when the character logs off or switches to a different style (which is always the same).
However, this remains in the Armory if you restore it after logging in and save it in the Design menu.