Okay, people, I have decided to try to fix the butt wrinkles. I have just enough fabric to cut out one back skirt piece. When I took it apart this morning, I noticed the back right piece got cut off grain somehow. It is longer and skinnier then the left side, and I think it's causing the rippling. SO, I will be recutting and resewing for the next few days. But first I must go buy more light gray thread and find my dumb tape measure. I am always loosing that thing!