The first time this happened to me was with flying geese. One of the boarders had the geese flying in opposite direction as the others. It was explained that in the past some quilter's actually made one block with a mistake on purpose. This was refered to as the "humility" block. It is your quilt and you will decide what makes you feel better. I try to lay my quilt blocks out either on the design wall or on a bed then I sew one row at a time then take a good look before sewing each row together. I hope this helps.