I just added Stemless Mulled Wine Glass to my Wardrobe. Instead of the message saying it was added I receiced the red bar error page saying I already had the item in my Wardrobe and now I have two Stemless Mulled Wine Glasses - one in my Wardrobe (as the last item added as well so it wasn't there already) and one in my inventory.

As I have to leave for work soon I'm just going to leave the item(s) where they are just in case staff wants to look into it. Once I'm back tomorrow (considering the page is up and running then) I'm going to delete the duplicate from my inventory.

I got dupes too but mine was form buying at Subeautique. I saw that was in stock so I attempted to buy it. However after getting multiple 504 errors and trying to refresh the previous page so that I could complete my purchase, I ended up having 4 of the item in my in inventory.

I'll do the same as you and leave the 3 dupes in my inventory for the staff to look into and I'll delete them tomorrow.

I deleted the duplicates and filled a ticket letting them know.

I'll do the same too then :)