The great thing is that Tesla can look at the Driving Logs to see exactly what has happening and how you have all you settings set. Also, as was mentioned above, Autopilot is currently for Highway use.
They can! But they wont, atleast not my service center in Stavanger, they can only do something about mechanical things here or push the latest software version(I assume my version is quite new though).
To be honest, Norway has almost no highways at all so Me(and most of the friends I know) use autopilot all the time on regular roads, it works amazingly almost never fails me.