Numerous attempts to do a fast service between Ebbsfleet and London not stopping at Stratford i always get routed via Stratford's platform and not the fast line , this also happens when going from London towards Ebbsfleet
So when I do this, after chosing Ebbsfleet platform 5, before I can decide on the final stop there is the question for routing. One route goes through Stratford, and the other says "Does not stop at Stratford". Did you chose that one, and still get routed through the station?