I have discovered a glitch in Service Mode... Let's say I started a service on Great Western Express and then saved and quit, I can resume it from the menu for any route. But the thing is, if I don't load it from the GWE menu, completing the service will progress the route you loaded the game from. I have no idea about how this glitch works, or whether it is possible in scenarios. EDIT: It turns out that it actually does progress on the route you're driving on, but says the name of the route you continued the game from on the results screen.