Unable to gathering levequest, level 77 Puroboros attacking through wall next to node

Platform: Windows
ISP: Comcast
Type of Internet Connection: CATV
Internet Connection Speed: 100Mbps
Date & Time: 11/07/2011 19:22 EST
Frequency: Always/Repeatable (retried 3 times)
Character Name: Lovely Nirokun
Race: Dunesfolk
World: Rabanastre
Class/Level: Miner / 19
Area and Coordinates: Western Thanalan/Horizon's Edge (13, 32)
Party or Solo: Solo
NPC Name: N/A
Monster Name: Puroboros
In-Game Time: 05:22
Steps:

Began mining levequest "Assaying Horizon's Edge" and proceeded to first gathering point.
Upon arrival, hit (through wall), by Puroboros' ranged attack for 9999 damage. Gear durability immediately dropped to 0%.
Unable to mine without KO, monster does not move on minimap from original location.

Greetings Nirokun!

We appreciate you taking the time to post all the details necessary. I apologize for the trouble with the mob attacking you through a wall. We will gladly forward your concern to be looked into. Any updates throughout the investigation may be posted within the forums, so feel free to check back from time to time. Thank you!