That is an interesting question. Lately I have only been able to see one seat in J ( if any), whether I look close in ( March) or farther out (November). Then last night, searching EZE to MIA, I saw seven seats in J on Nov. 18. This was on the flight that departs at 4:35 am, so maybe they have trouble filling it?
But I am beginning to think I cannot count on getting two award seats, so we will consider booking the one award seat in J that appears, and then pay for the other seat. But I wonder if we will have trouble matching the flights and getting seats together? Plus the potential hazards of flying on separate tickets ( like one getting bumped).