I had a wavy border show up after I had it quilted up to that point....uh-oh. What I did was: Undid the border to quilt seam from the middle towards the end. I didn't have to take it all the way off. Then I laid it back against the quilt, determined how much of the border was excess, I had enough to make a seam so I cut the border, removed the excess, seamed it back up and sewed it back on the quilt. There was some trick positioning around the machine but my border looked absolutely normal. I have no explanation as to how/where the excess came from because the quilt ended up being even. Just one of my mysteries of quilting....lol