Silly bees, they didn't read the book!! How DO they know what they are doing???
If its an observation hive, then don't try messing with any queen cells. You may end up with a slightly runty emergency queen, but keep in mind that she only has to lay up between 2 and 5 frames depending on your obs. hive, versus a full size hive which has 20 frames.
I've an emergency queen in mine and she does great and is going on year 3.
Relax and enjoy the show!!!