They are still using the longer one as well. I just made a new mule, and found four codes that did not work. I would get one message and then the other, it was flipping and flopping.
well, lately i have beem noticing that i can only type like 50 codes and then I get a bunch of no working, so then i have to reboot or change rooms. Then the codes work fine.
I've also found that if you get one of those messages so many times, every code you enter will do that.
So, if you change rooms and they still don't work, then you need to stop entering them for a while.
Or, log out and log back in.