Originally Posted by number_6

Actually it is the opposite. For OWE the rules concerning traffic rights and even cabotage are different. Most agents, and apparently even somewhat knowledgeable pax, know the common rules -- which don't apply to OWE tickets. A little knowledge can be a dangerous thing, esp. when it is thought to be comprehensive. Similarly the automated systems are implementing the 99.99% case and ignoring the 0.01% case -- which unfortunately is what applies to OWE tickets. But all the valid codeshares are bookable by using the right technique. Now if only there was true Open Skies and all this nonsense would go away.