I have run into a bug when I have two of the same weapons in my armory. I will try to explain what happens. I have two paintbrush blades in my armory: one modded with dark defence mods, the other with water defence mods. In the armory list, the dark modded one is listed first, followed by the water defence one.

When I go into battle, the first blade (modded with dark defence mods) is always selected. Even when I select the other one (with water defence mods) to use in my set, the dark modded one is always taken into battle. This even happens when I specifically make a set with the water defence modded blade, still the dark modded one is taken into battle.

The only option that I see now to use my water modded blade is to remove the other one from my set, however, this would delete the mods on the weapon and I really would not prefer that.