When i try to save my scene it saves it and then i test it out.But if i exit out of the game it loses all the scenes ive made.And ive already made about six of them which has been deleted.I need help with this problem.I am starting a mod and i need my scene completed and ready for the mod.By the way im making a l4d survival mod.

Unfortunately, index.ini gets the new scenes, but for some reason, the editor doesn't save the new scene.ini.
Best way around this, make a scene and direct the save to base.rte then take the scene out of base.rte and take out the new line in scenes.ini

So it works like this:
Put your made scene into base.rte with index.ini directories
Go into cc and make scene, save into base.rte with a different name.
Take the new scene and copy or take out of the base.rte with the map.
Remember to take out directories in the scenes.ini
put back into your own .rte folder.

Or at least, thats how i did it.