Does the service end at Ashford or only your run? It may be that the train continues after you finish (even in ECS) and the team have put this detail onto the run in the background
There's a difference between YOUR service ending at Ashford and the service terminating there. There are very very few services on the SEHS IRL which actually terminate at Ashford (I can find 7 per day from London which terminate at Ashford or it's sidings) as most go through Ashford and onto Dover, Ramsgate or round the loop and back into London