I was able to book the mixed cabin itinerary through AS and now ran into something peculiar.
The first leg has a "ticket not issued" as shown in the top right corner and the second leg is confirmed.
In the first leg, one pax has a "issue ticket to select" seat while the other is able to pre select seating. Upon clicking it says to select during OLCI. The "no ticket" pax also has no baggage allowance.
Now here's the interesting issue. CX confirms both legs are ticketed and I verified that there are four unique ticket numbers via CheckMyTrip. AS also confirmed that it was properly ticketed on their end.
I'm getting bounced and not sure if this is just a site issue or something else.