Being stuck with in demand can be annoying. I was stuck with the meatloaf very early and i found my first meatman around the time i found the goblins: Very late. Still haven't seen any meatman boss since then. If i had not beaten him then, i'd be quite frustrated by now.
But now, after the meatloaf (or at somepoint not too much later) the in demand item keeps changing, whenever i go to the dungeon (or only if i kill a boss - not sure). This was definitly not the case earlier, but hardly seems like a bug. It has less potential to frustrate this way. Initially i thought this was due to the recent version change, but your experiences contradict that.
Oh yeah - on topic: Bet on boss rocks! Not always worth it (if you die i.e.), but it always rocks! Nice quadruple trophy run, OP. Interesting to see that those wraiths also clog your taxidermy industry.