Importing with the midi would have been the method to use if it had performed chord analysis. This provided the ability to make the midi sync with the BB chord movement but does not provide chord analysis. Dropping the midi onto BB provides track separation but no chord analysis but gived no provision sync to BB.
So the combination of Open Open Special > Open Midi followed by dropping the midi file onto BB is really the only option in my case. But, as I already said, this sometomes gets the Melody track midi out of kilter with the tracks the have bee split out to the Utility tracks.

Henry Clarke could overcome this by simply ignoring the Melody track by muting it, but this has drawback. For a start it would mean the BB chord cursor would be out of sync with the utility clips and perhaps with the new RealTrack generation.
The problem really is BBs way of generating the sets of midi. They should be be the same because both are sourced from the same file.