If the interaction was recorded and you ask for it to be reviewed
1) They might agree the questions were imprecise and it's understandable why the wrong station was named, and then reduce the settlement offer to just the cost of the fare
2) They might decide it does look to them like a deliberate attempt to short-fare and increase the settlement offer to include the extra costs of the staff time involved in performing this review you asked for
3) Having reviewed the evidence again, and in the light of the new information about the true origin station, they might withdraw the settlement offer and proceed with a prosecution