I also have this same issue. The log shows that I have done all the quests, but it is not credited. The others that are complete no longer show the point-value (200 in this case), they get highlighted a brighter shade of tan, and are sorted at the top with other completed quests.
Edit: Just re-logged to see if that would fix it and all of my progress is gone (0/1000). This has been happening to others as noted HERE.