I can't remember exactly now, and I can't seem to locate the original pattern for tube quilting now, thought I saved it, but the one I started using hand an error in the width of one of the strips, both should have been 4.5 inches I think; since I can't locate the pattern, I can't be sure I'm telling you correctly, but check the pattern, that might be the problem, if it mentions different widths in the strips, try making a change to see if that helps...