It's been over a year since I've done that instance on any of my characters. When I last did it though, it bugged on me as well. I think I was further along in the quest than you are now. Anyway, I canceled the quest and restarted it and was able to get through it. Maybe it'd be worth trying to cancel it and restart it?
[color=skyblue2]Stocky 95 RK[/color] - [color=violet]Lalwrence 85[/color] -[color=PaleGoldenRod] Dov 95 LM[/color] - [color=MediumVioletRed]Lallie 85 Mini[/color] - [color=springgreen]Meghan 85 Hunter[/color] - [color=tomato]Lalraen 85 Champ[/color]