Keep getting logged out

So, I uploaded the WP shopping cart which completely desimated my website. I had to uninstall wordpress completely and then reinstall. I then uploaded my backup files from a few days ago. All of a sudden, i keep getting logged out like every five seconds. I have deactivated plugins, I have gone to 20 20 theme, I have done a security check on the website. ALL kinds of things are happening now……the media files for the theme I am using will not load at all. Every time I click an X to get out of theme configuration I get signed out. If I open the website up in another window (so I can see what I am doing) I get signed out. I am so frustrated right now, I do not know what direction to turn. Yes, I have read all of the support posts I can find about this signing out issue. I have cleaned out cookies and history.
One odd thing…..When I installed the new wordpress (after I had to delete the old one) I set up a user name and password. But after I uploaded all of my backups, it went back to the old wordpress user name and password. Won’t let me use the new one at all. As you can see, I am a mess………….help please!

The page I need help with: [log in to see the link]