All hens lay differently shaped eggs. Store bought eggs would have you think they are all the same. I can tell who laid an egg sometimes by the shape. I see more torpedo shaped eggs out of scrawny layers like Ancona and polish, and my Wyandotte always lay them torpedo shaped.
I think that is just normal for some hens. I had one orpington who almost always laid a torpedo eggs. She seemed healthy otherwise. Another hen would lay nearly round eggs.