Part of the problem is codesharing, you have to use two flight numbers for the same flight. The whole practice is confusing and I don't think it should be allow

Part of the problem is codesharing, you have to use two flight numbers for the same flight. The whole practice is confusing and I don't think it should be allowed, except in the rarest of circumstances. The seat quality is also suspect at best, when you're not directly buying from the operating carrier.