I am new at FM machine quilting having quilted by hand for the last 25 years. I am quilting a border and I am using blue thread for the top and white for the bobbin so that my horrible quilting doesn't jump up. Problem is that try as I may to fix the tensions a tiny blue thread shows up on the reverse on every stitch, is this normal? Please advise before I take it apart one more time. Thanks for the help!