I actually came to this thread to say exactly the same as your original post, but guess I'm nearly 12 months too late.
So thanks for the confirmation.

In the past I have never had a problem swapping the mapsettings.cfg from one map to another, but for the last week I have been playing around with a new Europe map that kept giving me nothing but grief but eventually discovered the problem I was having with my TT not starting was all down to the mapsettings.cfg file.

But because the TT would always started in Home, today I decided to actually do what you suggested in your first post and found it solved the problem.