Every 10 minute block I make, I have to pin the heck out of one end because there isn't enough fabric. I follow the directions. I even watch the video over and over, but I get a pleat at the end of the center. It's a tight fit. I've done 12 of them and every one of them is the same way. What am I doing wrong? She makes it look so simple. I'm even doing it with a layer cake so they are nice and big. Help!!