Make sure the photos are in a mirror orientation. People are not used to seeing pictures of themselves from an outside perspective. It looks "off" because everything is on the wrong side. If you only ever see yourself in the mirror, seeing a photo where my part is on the other side, my smirk is pointed the other direction or in leaning to the right when i expected to be to the left like i see that lose in the mirror me. Making everything feel, "off". At least that could be a small factor.