Remember how new item changes weren’t retro-active in early access?
When you had a Staff of Epimetreus with stats of a warhammer, they corrected this issue…however all existing staves with the warhammer stats were subsequently “grandfathered” by the system. They still existed. The changes only applied to newly crafted staves.
This is the reason our hard working devs had to remove all the dupeable Orbs, because they would have been grandfathered and still dupeable otherwise.
Also this is why one does not simply nerf vaults, or the legion armor. I think they have to solve this technical conundrum first, because removing all the old vaults and legion armor is not gonna sit well with the PvE folk.