I have been having trouble attaching the front and back of the quilt together. I can't keep them alighned. Just when I think I am finished, I look on the back and there is a large crease in the fabric, or more. Also when am pinning them together one is larger then the other, even though they are the same size. Does anyone know what I am talking about? I'm sure it ia as clear as mud (lol) I have made several baby quilts an this doesn't happen on them. It is only the bigger quilts that do this.
Thanks for any help you can give me.

Joyce