I once had a really nice route called, erm, New Route. It took me a long time to build and texture. Then one day, I decided I needed a one-board test layout with just the bare grid texture and some track. Guess what? That too was saved as New Route (the default name for all new maps in Surveyor) and I forgot to rename it. This was followed by much wailing and gnashing of teeth.....
Best wishes,
Padster