Dauntless Initiate Bunk Beds Mystery

Check Our Math And Help Us Solve the Mystery!In our copy of the book Divergent by Veronica Roth, we cannot quite figure out the whole number of bunk beds during Dauntless initiation mathematics.
The line in question is when Eric is showing the new Dauntless initiates to their room. He says, "Behind this door is the room where you will be sleeping for the next few weeks. You will notice that there are ten beds and only nine of you. We anticipated that a larger proportion of you would make it this far." "But we started with twelve," Christina replied. Woah, woah, woah, wait... the math doesn't add up! 
Christina Can't CountAs you can see by the list of initiates on the right, there were originally eleven initiates that we knew of.
This leaves us with a mystery... Where did Christina get the number 12 for the number of transfer initiates? 
List of NonDauntless Born Initiates:

What Does It Mean?
Was there another transfer initiate that we have missed?
Was the book changed later on and the math was not corrected?
What does it mean?? Divergent fans need to know!!
Was the book changed later on and the math was not corrected?
What does it mean?? Divergent fans need to know!!