Sometimes, there are errors in books--either by the printer, or in the instructions from the author. I know that on Eleanor Burns' website and a couple of others I've seen, there is a link for "Book Corrections". I have EB's "Still Stripping After All These Years" and had to print out a correction of the instructions for one of the quilts that I found on the website. Maybe you can Google "Carol Doak Quilt Pattern Corrections" or something like that and find out if there's been a misprint.
Most importantly, don't give up! Somebody here will have a suggestion to help you.