I can confirm that this is in fact bugged. I finished 3 daily quests (and got the rewards for the quests) and yet the "Finish 3 Dailies (150 MP)" didn't get finished. It is stuck at 2/3. I am 100% positive that I finished three quests after I started the Cup node (how can you even get confused with this? This is the most frustrating horrible challenge in any reward books. I am 100% positive that I completed three quests and still it is stuck at 2/3). This is just frustrating. All these small small bugs are really frustrating. Of course, I restarted my game, restarted Gog, restarted my machine and even waited for many hours before launching the game (thinking it would get consistent), but still it is not counted.