There are indeed two darts in the traditional kilt, but they are to help the inverted pleat and the large pleat lie more nearly flat, and to help line up these two pleats that are on the inside of the kilt. Generally they are about 7" long and are tucked inside the two pleats mentioned above.
Steve is quiet correct, there are no pleats on the outside as that would mess with the pattern. However, you will find them on the outside of pleated skirts and there they are visible.