Much like a previous poster, it appears (though hard to tell with these perspective limiting photos) that your shoulders are a little more square or posture more erect than what is built into the shirt. Then, it looks like the yoke may be too wide falling off your shoulder but maybe not. The [main] problem is made a little worse by insufficient room in the chest only. Adding to the sideseam under the arm would be the right fix but isn't possible to a finished shirt.
1/19/14 at 11:00am