Had to tele out of battle with first crassian scout.  Returned to Ashdale and it's all populated, as if I finished the quest.  I didn't and can't get back to the sewer.  Hole behind house is covered, tunnel at bottom of cliff is not letting me in.  So..... hmmmm .  And the quest reminder on screen won't go away.  Any ideas?

You've got to take the boat back, not teleport I believe.

 

The boat dialogues should then give you the option of the quest or not and take you to the appropriate version of the island.