You should resolve this problem by setting the Cue Out point on the Steve B track to be the very end of the track so that the next track does not segue until the very end. Unticking the Segue tickbox will cause playout to stop at the end of track, which, if you are running automation is not what you desire.
Thanks Jason, have done that now, makes sense.
Could not setting a segue for an audio track that spans clocks (a 2hr pre recorded music show) cause the next show not to load?
Total long shot, but first playitlive problem in months and the only change was not setting a segue as the the show creator did not want his outro blended out with the first track in next clock ?