Major Mistake in the Book "Humans are Weird: We Took a Vote"

So my loyal fans have found and reported the (first?) major editing mistake in the book. It turns out that one chapter in Book 2 is a repeat of a chapter from Book 1. 
Now this isn't supposed to happen, the books are suppose to be 80% pre-internet published and 20% OC but there are not supposed to be duplicate stories book to book. 
What kills me is that I really had to cut this one down story wise to fit in the longer  adventure story at the end. So that means that I regretfully sent several good stories to the "next time" file and one of them could have replaced this duplicate....
Ah well... Such is life. 
I will pay better attention next time.