If you are starting a fresh site, it would be better to reinstall WordPress from scratch – or at least clear out the database. Use something lke myPhpAdmin to empty the data base, and then WP should do a fresh install – ask for name, admin name, etc. Then the database will start empty and not have possible junk to cause problems later.
But it really is beyond the scope of the support here to try to figure out what remnants you have, or where they came from. This is really a WordPress management issue, and not related to the theme.