Hi fellow quilters! I do most of my quilting by machine with a walking foot. Occasionally I have trouble when doing all over diagonal channels that the quilt gets out of square. I mean it get distorted and then it lays crooked when I get the binding on. Should I do all the stitches in the same direction? Or should I alternate first one way, then turn around at the same side and go back the other way? I tried loosening the tension, but that didn't help. I would love your suggestions!