Originally Posted by
Air Rarotonga
If you make two separate tickets (XXX OZ ICN OZ HKG and ICN CX HKG), the system will not find out the double booking. If booked this way, CX has no access to OZ bookings, even if they were using the same GDS (Amadeus).
Thanks!
Plus OZ is Star and CX is oneworld...
Still a bit hesitant to get my main ticket cancelled

Read somewhere AA was building software to detect this kind of stuff.