Changing your config-inc.php isn't going to make a new database appear; someone would have to run the installation program to get a new set of tables to appear.
Is it possible you ran the install more than once? It looks like a basic installation with no options set and it seems more likely the result of an install run that you didn't take to completion.
If someone did go to the effort to do all that, why did they stop there and would be be gained by installing another database?
Please do not PM me for support or sales questions. Thank you for your understanding.