There's a bug in Nexus ongoing where people are completing their quest and getting duplicate items. I personally have an extra 'night mushroom' kicking around, but have seen a bunch of folks with the coins from completing the levels. I can get the blue one to appear again, but it is a blocking npc (can't walk into it and 'pick it up'). Would love to have this set of coins to remember this by... but if everyone can't then no one should...