Ahh, that makes sense.
Myself and nad sieged godspy about 2 weeks ago, and upon killing him, we each obtained some captain gear. Nad dropped all of his, and so did I (other loot was to be found elsewhere) but I noticed that there were two of each tool, and each one had the same durability. However, as it was captain gear, it was left to despawn.
Not trying to witch hunt, but apple are a popular target for attacks, lots of sieges day in, day out, and so it is more than likely they have, unintentionally or otherwise, found themselves in possession of some duped gear. Likely no way to check, as they would have likely used said gear to defend themselves against the next siege, changing the durability. Still, might be worth checking.