Originally Posted by
GE90-115B
If flightstats.com shows the loadings of business as "J/2 C/2 D/2 I/1 ", does it mean there is a total of 7 available seats in J?
Absolutely not.
Those are inventory. They are different from capacity (what a flight can actually carry).
Airline tend to overbook. So the inventory is usually more than capacity.
So for this case - the reality is there may be only 1 J seat left.