The assembly technique is part of the copyright. So if you want to publish an old pattern that belongs to someone else, under your name, you better do something significantly different, (like a convoluted assembly technique). Not saying that is what she did, not accusing her of anything. Then again , this might be the original old technique before our new tools and pre cuts were available. Or as you say, she might be math challenged. Either way, it is a beautiful and most unusual quilt. I really love it.