There is an unstated tradition within the Amish and Mennonite communities that each quilt has a "mistake" in it. This is because no one person is perfect except God and therefore, no quilt will be perfect.
That idea was from a journalist who wrote about the Amish quilts. The Amish quilter never said it. The Amish said about it: We would never presume to think we could make anything perfect, only God is perfect. This myth has been taken as truth and the Amish really don't like it attributed to them.