I did 15 Dungarde quests today, and now it's showing 0/15. I don't want to take advantage of a bug so I'm not going to do them until after midnight if they weren't reset on purpose.

they reset them at around 6p i can't link individual news comments, but if you search for or staff, you'll see rah mentioning they reset after adjusting the item pool

Well, it doesn't matter now because the day's flipped over. :)