I'm not sure if this applies to you or not. I had completed the quest (see below) and the courier showed up again with the same message, but it did not restart the quest.

To speed things up I went to one of the word-walls, where you'll usually find a dragon because the dragon respawns regularly. I killed the dragon, then hit '`' to go to the console, clicked on the dragon, and typed "resurrect." killed the dragon again... and again... and again... The dragon was having a really bad day, but I got the quest done.

Got to hand it to you..I had not thought of that. I managed to kill all 15 dragons.

引用自 nancylebriar：

Each time I start this quest and after killing about nine dragons..I run into another courier and the same quest starts over again. It will not allow me to complete the quest before it either starts over or if I log out (even after saving it) it starts over again. Help ?

With the April 1st update, I went in and I'm pretty sure fixed this issue. What I think happened was a script for the castle's quest had an Update method that would call all the time, but I placed in there a check that if the quest has already been completed or if the point of the scripts usefullness had passed, then stop running the script. This should fix the problem you were having :) Let me know if the problem persists or not!

Mine is working now. Thank you so much for your help and patience