Seconed Floor

I can not find the seconed floor boss for three times, i do not know why, the boss is not at the location where the youtuber said so. I do not know where is it, so i keep flying over the map, but i can not find out the boss location and the time is run out. I never get the blue items or bless scrolls from the Twisted Underground Prison, but i saw the facebook and youtube, there are lots of player get the good stuffs. Plus, if i get the seconed or third floor passport, and i hardly find the boss even with the boss location. I think i only meat the seconed and third floor boss once per each floor, that is really weird. I do not know about other players, but i think the boss is not always pop. Good luck to me.