I have only done one log cabin in my many yrs of quilting...I do not like doing it...but I do remember the hint that you sew on the strips counterclockwise.......and something about if you sew over more than one seam when urging on another log, something is amiss. before I do any piecing, I make one sample block and pin it onto a small tabletop flannel covered board right in front of my work area........so I can check as I go....-- propped up at eye level....has saved much frog stitching ( rip-it,rip-it)....