whilst waiting for you I just attempted to run a 25 floor expert hunter solo... couldn't pass floor one. The ONLY key in the level was a ceiling fan glitched one. :/ Seriously pisses me off enough to make me want to throw my 3DS.
I just e-mailed Nintendo, notified them the glitch was related to the ceiling fan and how I feel the problem arises from the key being "stuck" and not popping when it should from the fan being spun, or it is simply not generating at all. I asked them if they can confirm a patch for it. If they say there is no intent to patch the game... Animal Crossing: New Leaf will be my last First Party Nintendo game I ever buy.