Hi, I am rather new of using KVS. I notice the availability is not so accurate.

I enquire PVG-HKG on 5-Jan. The result is
[KVS Availability Tool 7.1.0/Diamond - Sabre: Availability/FS/US]

PVG Shanghai PuDong CN [ZSPD]
HKG Hong Kong Intl HK [VHHH]
SUN 06 Jan 2013

Carrier Flight From Depart To Arrive A/C St Availability
--------- ------ ---- -------- ---- -------- --- -- --------------------------------------------------
CX/KA 6855 PVG 08:25 HKG 11:05 320 J7 C7 D7 I6 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O2
CX/KA 6845 PVG 08:40 HKG 11:25 333 J9 C9 D9 I9 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O9
CX 365 PVG 09:45 HKG 12:30 333 J9 C9 D9 I9 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O9
CX/KA 6833 PVG 11:20 HKG 14:05 333 J9 C9 D9 I9 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O5
CX 367 PVG 12:20 HKG 15:05 773 J9 C9 D9 I9 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O9
CX/KA 6853 PVG 12:50 HKG 15:35 320 J3 C4 D3 I2 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O9
CX/KA 6861 PVG 13:20 HKG 16:05 321 J9 C9 D9 I9 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O9
CX/KA 6835 PVG 14:20 HKG 17:05 333 F9 A9 J9 C9 D9 I9 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O9
CX/KA 6865 PVG 15:20 HKG 18:05 321 J9 C9 D9 I9 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O0
CX/KA 6859 PVG 16:20 HKG 19:05 333 F9 A9 J9 C9 D9 I9 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O9
CX 369 PVG 17:25 HKG 20:15 77W J9 C9 D9 I9 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O9
CX/KA 6863 PVG 18:20 HKG 21:05 333 J9 C9 D9 I9 Y9 B9 H9 K9 M9 L9 V9 S9 N9 Q9 O9


It shows a lot of availability on CX367 on V class (V9). When I called CX office, they told me there is no V class availability on that flight and it has to wait list.....

So my question, how can I get very different result?