I am embroidering puff onto a baseball cap (Hawk Head) design. Using a tearaway stabilizer and 2mm puff. I am experiencing a problem with the final sew out where the design is pulling in (concave) the area of the design on the front of the hat. Get the same happening on other puffed designs also. Using a Pantogram 1501 single head machine. Looking for suggestions as to what I may be doing wrong. Ideas?