I don't know if it's a real bug, maybe I'm wrong about how I thought gear sets would work, but I noticed something. When I used my saved set-up, but de-selected 1 unit (not healed up yet) and selected another 1, equipping it with the de-selected units aether items, I didn't expect the items to stick permanently with that unit, since I did not save it. I thought by not saving, both the unit set-up (which it did) and the gear set-up (which it didn't) would show up as in the original saved set-up.
Anyone able to help me out on this one ?
EDIT : I have also seen 1 wounded unit in my set-up healing up, but when it was healed, I had to de-select and re-select it in order to let the game know it was healed.