I recently got some J Crew factory dress shirts (for work) and have had some odd fitment issues. When I put the shirt on, the body seems fine to a bit loose, but not so loose it looks like a cape. When I tuck it in it looks fine and throughout the course of the day with sitting/movement, it seems to bunch up a lot and widen around the body and look too big (way bigger than before). I don't have any pictures right now, but could this be a problem with my pants fitment or the shirt being too short or...? I appreciate the help in advance.