I have studied your block. I think I have figured out what is different, but I may be wrong. If I am just ignore this, I don't want to confuse you more.
It looks like you put the first three together red and whites, then you added a light purple, dark purple, dark purple, then the other light purple. I don't know about her books, but I teach my students to go around in a circle. I would sew your block the following way: the red and white squares, second white, dark purple, dark purple, light purple, light purple, around and around. I don't know if this helps or not. I feel really bad that your are frustrated. I wish I lived closer and could help you, but there are quite a few states in between us. Just think, when you figure it out you will never forget. You might even google Free Log Cabin Quilt block patterns and just look at the directions and pictures you find. It might help to look at something besides her books for awhile. Just an idea...