Yea, I've done this too. I felt the bump on the bottom, but ignored it till I got to the edge of the quilt. Time it took me to FMQ that part, 4 minutes, time to rip it apart - 2 hours,40 minutes plus all the unmentionable words ever created. Now I baste the quilt to about 1/2 inch of the edge of the borders so I can check that the batting and backing didn't fold under.