Similar thing with JB. Also now that they have 3 tiers and since we only check 1 bag I have to book one fare carry-on only and the 2nd fare one ch'd bag If I book both together at same time I'll be charge 2 @ which ever fare I choose.

Because of this I noticed the same situation as IslandB had; sometimes only 1 seat available. So I always search for 2 seats then buy 1 go back in to buy the 2nd. Airlines don't make it any easier that's for sure.