Trading bug: Item disappears after completing a trade

This bug happened to me on 2 seperate occasions. I will make a report for each one

Time: 07/10/2013 11:53 am CEST
Frequency: Once
World name: Shiva (EU)
Character name: Sho Lhung (receiving item) and Azuma Rosinya
NPC name: N/A
Monster name: N/A
Class/Level: Goldsmith/50
Party or solo: Party, I think it was 2 people
In-game time: 10:53
Area and coordinates: Gridania, in front of the market building
Steps:
1. I traded items to craft HQ Goldmsith Boots to Azuma Rosinya
2. Azuma Rosinya crafted the item
3. Azuma Rosinya traded the item to me
4. We both accept
5. I couldn't find the item anywhere in my inventory, armory, retainer, melding window. I am 100% positive that I did NOT discard the item

Connection Specs
- Type of internet connection/provider: cable/telenet (be)
- Modem maker/model number: /

PC Specs
-=-=-=-=- System Information -=-=-=-=-
Naam van besturingssysteem Microsoft Windows 7 Home Premium
Versie 6.1.7601 Service Pack 1 Build 7601
Andere beschrijving van besturingssysteem Niet beschikbaar
Leverancier van besturingssysteem Microsoft Corporation
Systeemfabrikant Dell Inc.
Systeemmodel Dell System XPS L502X
Systeemtype Op x64-gebaseerde PC
Processor Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz, 2201 MHz, 4 core('s), 8 logische processor(s)
BIOS-versie/datum Dell Inc. A12, 7/09/2012
SMBIOS-versie 2.6
Map met Windows C:\Windows
Systeemmap C:\Windows\system32
Opstartapparaat \Device\HarddiskVolume2
Landinstelling België
HAL (Hardware Abstraction Layer) Versie = "6.1.7601.17514"
Gebruikersnaam Menno-PC\Menno
Tijdzone Romance (zomertijd)
Geïnstalleerd fysiek geheugen (RAM) 8,00 GB
Totaal fysiek geheugen 7,90 GB
Beschikbaar fysiek geheugen 5,04 GB
Totaal virtueel geheugen 15,8 GB
Beschikbaar virtueel geheugen 12,5 GB
Ruimte voor wisselbestand 7,90 GB
Wisselbestand C:\pagefile.sys
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Laptop Model Name: Dell XPS
Laptop Model Number: L502x

Screenshot: http://i.imgur.com/I5y6W7Q.png (can provide unedited in pm)

Time: 09/10/2013 01:39 am CEST
Frequency: Once
World name: Shiva (EU)
Character name: Sho Lhung (receiving potash) and Tyrus Iceshifter (receiving vanya hat of casting)
NPC name: N/A
Monster name: N/A
Class/Level: Weaver/50
Party or solo: Party, 2 people
In-game time: 00:39
Area and coordinates: Gridania, in front of the market building
Steps:
1. I crafted the HQ Vanya Hat of Casting (my own mats)
2. I traded Tyrus Iceshifter
3. Tyrus Iceshifter puts 6xPotash in his trade window
4. I put the Vanya Hat of Casting in the trade window
5. We complete the trade
6. I received the potash, but Tyrus did NOT receive the Hat. The slot where the hat was is EMPTY
7. After check his inventory, i suggest we trade something to see what happens.
8. Tyrus opens a trade window
9. The item APPEARS in the same slot in MY inventory (I have 6xpotash AND the hat in my inventory)

Connection Specs
- Type of internet connection/provider: cable/telenet (be)
- Modem maker/model number: /

PC Specs
-=-=-=-=- System Information -=-=-=-=-
Naam van besturingssysteem Microsoft Windows 7 Home Premium
Versie 6.1.7601 Service Pack 1 Build 7601
Andere beschrijving van besturingssysteem Niet beschikbaar
Leverancier van besturingssysteem Microsoft Corporation
Systeemfabrikant Dell Inc.
Systeemmodel Dell System XPS L502X
Systeemtype Op x64-gebaseerde PC
Processor Intel(R) Core(TM) i7-2670QM CPU @ 2.20GHz, 2201 MHz, 4 core('s), 8 logische processor(s)
BIOS-versie/datum Dell Inc. A12, 7/09/2012
SMBIOS-versie 2.6
Map met Windows C:\Windows
Systeemmap C:\Windows\system32
Opstartapparaat \Device\HarddiskVolume2
Landinstelling België
HAL (Hardware Abstraction Layer) Versie = "6.1.7601.17514"
Gebruikersnaam Menno-PC\Menno
Tijdzone Romance (zomertijd)
Geïnstalleerd fysiek geheugen (RAM) 8,00 GB
Totaal fysiek geheugen 7,90 GB
Beschikbaar fysiek geheugen 5,04 GB
Totaal virtueel geheugen 15,8 GB
Beschikbaar virtueel geheugen 12,5 GB
Ruimte voor wisselbestand 7,90 GB
Wisselbestand C:\pagefile.sys
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Laptop Model Name: Dell XPS
Laptop Model Number: L502x

Screenshot: http://i.imgur.com/X3VSv3N.png (can provide unedited in pm)

Also posted to reddit http://redd.it/1o1254

Thank you for posting your concerns about your trading bug Issue. I have made sure to submit all of your information to the development team and they will thoroughly investigate this matter, based on your report. Unfortunately, I cannot guarantee that a direct response will be posted on this thread, but I do recommend checking Here or Here for any details regarding the development team's investigation. Thanks again for your report!