A site visitor queried why they had been charged the zone 1-3 cap instead of the expected zone 1-2 cap recently, and it has thrown up a missing route option between a number of stations in SW London. The system thinks you’ve gone via zone 3 even when you haven’t. The problem
I’ve received clarification from TfL that they have indeed added a new OSI between the above two stations. This means that you can now avoid Notting Hill Gate when changing between Circle/District Lines and the Central Line.