I've been running into this issue for a flight I'm planning for later in the year. I'm looking at SEA-LHR-HAJ/DUS/HAM (whichever is cheapest when I book). So when I select the Business fare I get Business on both flights, booking into J-J. But when I select First, I get First on the SEA-LHR leg, but I get what they call Economy Plus (which I cannot find anything about on their website) for LHR-HAJ/DUS/HAM, which books as F-J. I don't know if that puts me in Club Europe, or in the back of the cabin. Thoroughly confusing. Does anybody have more intel on this issue?