Bug/feature with worst-in-bags - Upgrade with valor - duplicates

For Worst in bags, when “Never discard items that can be upgraded with valor” is checked, duplicates are not caught. I can make a case for inferior not being displayed as those could still be turned into tier with catalyst, but if I’ve got two or more of the exact same upgradable item, I think telling me there is a duplicate with the above checked would be helpful.