Long story short, there is a bug with the completion of the final step of the exotic quest, relics of the golden age.
What happends is, me and a friend go through the quest on nessus, kills the final boss unit.
I get the completion on my screen and it says i need to go to the farm next and talk to the NPC.
The second i get out of the instance the quest is yet again incomplete and available to be done again. this has happend twice and there is no doubt something is wrong.
Please help bungie, i really would like to get my exotic weapon.