I'm planning a LAX-LHR trip in mid-November and my travel agent's computer says E+ is configured 2+5+2 whereas the United website shows it as 3+3+3. How can I be certain which is correct? I'm travelling with my wife so I want to sit center+aisle, and try for upgrades using my SWU's, though I'd be happier if it's 2+5+2 so we can have two seats together...