you are very much right. why not just post the best number you can and move based on action. there is no need to shade the square because in the long run they are going to lose anyway. it may take a littly longer but this business of dealing more than one line is ridiculous. if you are running your book correctly and are properly funded there is no need to deal more than one line. in gambling whether you are the player or the book, it is a marathon and not a sprint.