Take what it says on link with a pinch of salt don't think the guy who wrote it has travelled all the routes. He say that most buses turn left onto second road from south road the opposite is true and he doesn't mention Soi Bua Khao routes at all.
Also if someone charters the bus that you are on as a taxi and it turns off route you do not have to pay. Just walk away.

many of the Baht bus drivers are off duty cops or Family of cops who own the buses they think they are above the law .