Its clearly a 1 as the next number is 4. Still giving me a tight stitch, I then switched to 4 and it sewed an even smaller stitch. Today I tried again on 4 the stitching seem a little bigger but then ir started sewing small again. Why is it changing the sticting? Very annoying....Please help. Stitching keeps changing by itself is there a place on the machine i need to tighten?