When I look on Galileo or Worlspan I can see that there is only 1 booking seat in First DIM 19 juil 2009 from CDG to NRT (P1)
AF 276 CDG 13:30 NRT 08:10 +1 772 P1 F0

But if I want to see details, on Amadeus, for example, I can see two seats available: there are 4 seats in First on AF Boeing 772

CDG Paris Charles De Gaulle FR [LFPG]
NRT Tokyo Narita JP [RJAA]
DIM 19 juil 2009

A | E F | L
1 - - + +

What will be the real world?