I´m new and peaking at the interesting SH platform.
Clear to me is that you can have only 1 production *site* 
Then you have Staging and Development branches and there it is getting a bit cloudy for me.
It looks like any instance in any of the branches is having their own private configuration and data database.
But the Staging instance start with a copy of the production configuration. 
If I create a new Staging instance based on a other Staging instance, should it then make a copy of the staging config and data database ? 

Or how is it setup / working ??