I never went back and did the 2nd Fin Dorsal quest. I finally went to do it after finishing the main storyline and ran into a problem. It was not letting me fight Archer and his name was green. I switched realms and eventually saw someone fighting him so I was able to join and complete the quest. My guess as to what caused this problem is that once you get to the point where Scurvy Dog Hideout enemies will no longer attack you, it does this for all enemies of that type including Archer. Just a warning that you probably want to do that quest at a lower level so you don't hit that problem.