Nick,

thanks for getting back, I guess I am just frustrated that the Little Red add-on to my ticket (which I paid in cash for) rather than the MPM bit is is causing the problem. I would have thought they would have had some systems flexibilty there, but they do seem to be set up for more simple point to point routings and are treating MAN-LHR-LAX as they might treat a NBO-LHR-LAX routing.
It is very frustrating, trying to pay an airline not to fly you...