I Ching, Orion Plain and Simple

This book is easy to use and understand but, there is a problem... I think there is mistake with one of the Hexagrams. Hexagram 5 is repeated twice (again as number 34), I discovered this trying to find the Hexagram after casting my I Ching and couldn't see it. I had to Google the Hexagrams to figure out were the missing Hexagram should go. This is quite a major error and not very helpful. :(