I don't know how the ammo drops are still decreased if you have multiple of the same "X Ammo Finder" perks on equipped armor. It's a known issue and at the very least if you have multiple of the same, say Special Ammo Finder, perks equipped and Bungo doesn't want it to stack, we at least shouldn't be punished for it. Just make it useless to have multiple equipped, not decrease it. And I'm offering this with ideas because if it was a bug, it wasn't in the "Season of the Drifter Known Issues" post, and I highly doubt that you haven't noticed your community reporting this. I still wonder if Bungo employees play their own game.