New site appearing in folder structure after first hit on homepage? This one has me scratching my head.  I'm new to Drupal and am trying to restore a backup of a Drupal 7 site to a 3rd party hosting provider (hostgator as it happens.)

I purchased a business account and domain name to experiment with, and via their interface installed Drupal 7 in the public_html/myaccount subfolder.

I then restored the backup to that same folder.  Beneath myaccount is the typical drupal file structure-- includes, scripts, sites etc.  

Beneath the sites folder were subfolders all and default, exactly as restored from the backup and a typical Drupal structure.  But that has changed.

When I browse to www.myhostedsite.com/myaccount I get an unstyled version of my site along with messages on the page that say things like:
Undefined index: highlighted in include() (line 126 of /home4/xyz/public_html/myaccount/modules/system/page.tpl.php).

...and to my surprise, under the sites folder there's now a new folder with the name of the old site, with js and css subfolders beneath it.  

How did that appear, and would anyone know what I may be doing wrong?  I've noodled with .htaccess and settings.php values but am not sure I know what to look for in either location (though I did set the database connection correctly in settings.php, I'm pretty sure.)
It would be good if you ask HostGator support guys to assist you through your problem. Got to Support and create a support ticket.