I've noticed a quirk trying to use the Camera Editor app in assetto corsa. You can change the camera settings, but often if you click 'save' no settings are actually saved and the next time the game loads you have re-do your camera settings. Here's how to fix the problem:
1. Open the car in the Assetto Corsa/Content Manager content tab (this fix will require that you be running Content Manager and not vanilla AC).
2. Click "Unpack Data"
3. Click the folder button so that it takes you to the car's mod folder in windows explorer.
4. Rename data.acd to data.acd_old
5. Load the car into the Assetto Corsa game.
6. Make your desired camera changes.
7. Click "save"
8. Close assetto corsa and open it again to verify that your camera settings have been changed.
I hope this works out for you.
Cheers.