ah..that reminds me..a couple of years ago, I was trying to book Manch to Washington and having used the sadly demised BMi route before, asked for it again.
The reply that came back from the agent offered me a routing MAN-LHR-IAD with United Airlines. When I replied saying that I wanted the BMi route they insisted that that's what I was travelling on - BMi to LHR with a code share from LHR to IAD.
They actually didn't know that they flew non stop!!!!!
God help 'em if it takes a customer to tell them their job.