Duplicating Items

https://www.pathofexile.com/trade/search/Settlers/kql2m3nS5

This is the second time I have seen this with Simplex Amulets this league

As you can see he is selling 2 of each of the same simplex with the same name and the same exact stats. The last person I bought from had the same thing but only listed one at a time.

The items are still listed. Why isn't anything being done about this? This is the 2nd person I've seen selling duplicate Simplex amulets... Ruining markets

It's also not a glitch in the system because these are the copies. You can see that they occupy different spaces in the stash

@肥仔曦 Hi, I would like to buy your Rapture Charm Simplex Amulet listed for 275 divine in Settlers (stash tab "15"; position: left 11, top 5)

@肥仔曦 Hi, I would like to buy your Rapture Charm Simplex Amulet listed for 275 divine in Settlers (stash tab "15"; position: left 12, top 5)

@肥仔曦 Hi, I would like to buy your Dragon Clasp Simplex Amulet listed for 275 divine in Settlers (stash tab "15"; position: left 11, top 8)

@肥仔曦 Hi, I would like to buy your Dragon Clasp Simplex Amulet listed for 275 divine in Settlers (stash tab "15"; position: left 12, top 8)

You actually can legaly duplicate simplex amulets as well as there is chance of duplication in heist, so it's not necessary a glitch-using.

What are you talking about? You cannot legally dupe simplex amulets. You can split them, mirror them and 5:1 them. Unless you have some secret recipe this is not true. None of the above mentioned will result in the EXACT same item being made either.