For a flight that departs that late in the year, CX cannot ascertain what aircraft it will allocate for CX 734. If your ageent could do a direct access on CX fo availability, she would see that the flight on CX's direct access that F and A would show ZERO. Which would mean that CX is blocking off the First Class seats because although it normally would sell a 3 class aircraft for that flight on that day, it COULD very well assign a 2 class aircraft that day at the last minute. Hence rather than put out a seat map for a 747, it would rather give out a seat map for an A330. As the day gets closer to the date of travel, CX might operate the 747-400 as a 3 class service after all.

The loading of flights has nothing to do with SABRE but rather what information CX gives its CRS hosts. SABRE can only update with whatever information CX gives. Hence it's better sometimes to check direct access because it gives a better availability that Direct Connect access.