Ixal Quest : Larboard and Lodging Bug

Influencing Inquisitors - unable to finish the quest
Windows Version

Time: 3 AM GMT+9
Frequency: unknown
World name: Masamune
Character name: Cipher Greensleeve
NPC name:
Monster name: none
Class/Level: Miner lv 50
Party or solo: solo
Area and coordinates: North Shroud, Peace Garden
Steps:
I started this quest and went to dig the granite rock when i got the 15th small granite rock the duty list updated. And I cannot get my 5th Large Granite Rock nor hands in the quest to the Independent Merchant NPC.
http://i.imgur.com/ZJFAuuy.jpg
http://i.imgur.com/TdReSF7.jpg
http://i.imgur.com/4dLb9AG.jpg

Thank you!