Now for the bug - I have leveled to 30 to 40 in under 2 hours, and 40 to 50 in under two, with minutes to spare on the buff. (I had a daily and lvl 30 quest for 2 enlightment to achieve this.) But when I did the quest, for the next enlightenment, while under the few minutes left on the buff, I noticed that it had said 2 hour. Suddenly, I gained about 1h50minutes of the buff, off what is supposed to be one hour. I figured this couldn't be the case, clearly this did not happen, because Blizz doesn't have down to the minute timer on buffs passed 1 hour, so clearly that's the only reason it says 2 hours. But I timed it, and I certainly had 2 hours of it.
I did this test again, testing at 40 to 50 the next day. Same thing. So later on, during 60 to 70 spurt, I tested once more. I had the 60 quest to do, and a daily in spare for the normal 2 hours. But I did the non daily first, let it go down to about 10 minutes, then got the second buff. Surely enough, it was a total of 2 hours. So that's 2h50+ minutes per 2 buffs. Clearly an oversight.
I feel it my obligation to tell of this bug. I feel it is my monk duty. When a monk wants to tell such a 'great' bug to the developers, it's not because I do not love my class, it's that I love this game in general. It is a bug, and it needs to be pointed out.