I know with my machine that I can press a button to have the needle to stop with the needle in the fabric or out of the fabric. If I choose for it to finish in the fabric, then it will make that last stich to stay within the fabric...does this makes sense? Is this the reason for that extra little stich I think I see in your picture? If it is then perhaps you need to play around and alter your stich length to keep it to the finish you want? Not sure but that is what I sometimes need to do with my machine. It is not that noticeable but I understand that it is annoying sometimes especially when you pride yourself in doing things 'properly'. Best wishes.