Random weapon equipping without going into inventory

So I was out killing mobs, I noticed my damage just drop. When I went to go clean out my inventory I had noticed that my weapons had swapped. I did have them flagged to keep so I do not destroy them by accident. But, I swapped them back to what I was using, two GA weapons one bow and one dagger. This happened to me three times! I never once entered my inventory while fighting anything! I lost two GA weapons due to my weapons self equipping by themselves!