I like to manually manage my items and that includes the Armory Chest.
When switching classes and jobs, it messes up the organization because it just puts the item in the nearest opened spot.
Please allow the items to return to the same slot chosen in the Armory Chest.
P.S. Please let us assign which items goes in to the Armory Chest instead of everything equip then unequip go to the Armory chest!
This is my biggest pet peeve with the game. Also, if you have 2 of the same items with different materia melded to them, the armory chest can't tell them apart.
The armory system is actually a bit broken. If you have two of the same jewelry with different materia saved to two different class sets - ie, my goldsmith has jewelry with crafting materia, and jewelry with elemental resistance materia for spiritbonding - it doesn't save the particular one that was on your gear set, it feels random.