This really weird, and I get the same numbers.
Not long ago, you mainly needed to access the local AF website to purchase a ticket. Now that is available from many national websites.but not all (I cannot buy your itin on Hong Kong website).
I was assuming that they were forcing the POS to be local. But I was clearly wrong.
I checked EF on your example as they provide availability from several POS including France and USA.
On AF83 with French POS they have J9 C9 D5 I0 Z0
On AF83 with USA POS they have J9 C9 D9 I9 Z9
That explains the result.
This is really crazy if you have to lose time and game the system.Here the difference is gigantic (even if the ticket conditions are very different).
Maybe there is something special with the TATL JV.???