I can't figure this out. I made a french braid table runner and had no problems. Then the second one kept going crooked. I ripped it out and the second time wasn't as bad but I could still see it was crooked. And one end was worse than the other end. What am I doing wrong? Can't understand why it worked fine the first time and the second one was always crooked. Sorry I can't give a pic. It's already been given to my mom. Thanks for any advice.