Please fill in as much as you can :
Date and Time(Please, specify the timezone) :~20:20 GMT -3
Server Name:SA Silute
Team Name:Sakishima
Character Name:Shisei
Bug Description :I sold 2 Instance Clear Voucher on the market, retrievied the money of it (540000) and the 2 instance clear still was on my retrieve item list and I was able to retrieve it like it wasn’t sold.
Steps to reproduce the issue :
How to get rich 101
Seriously though, maybe you had other items listed that got sold instead?
How do you retrieve itens from the market? I sold a bow there by mastake and I want it back…
If it’s already sold there is no way to get it back. 
If the item is just on the market and listed, so not sold yet, then you can go to the “Sell” category at the top of the market window and press the “Cancel” button. The item will then be sent to the “Retrieve” category.
Oh I see, he said the market but I misunderstood and tought it was at an NPC, thanks!
It was my first time using the market, though I canceled the clear voucher one time because i wanted to change the price. The only thing I can think (in the case it’s not a bug but my fault) is that maybe I didn’t cancel and put another item instead. But I can’t really think of anything that i could sell for 300,000ea, since my account is new.
Only wait to do it is to reproduce the “issue”. Hahaha. Try it again (with those 2 vouchers if you still have them) since you don’t seem to be doing anything suspicious, and it’s just what everyone does (sell stuff on market).
If you don’t get back to us here in a week, I’ll just presume you’ve struck gold. 
Remember, abusing exploits is bannable, but discovering and reporting them isn’t since it helps the game improve. It’s best if you just send them a ticket instead of posting here on forums as others might try to abuse it if it does really exist.