Go to Dashboard; Appearance; Editor then look for footer (footer.php) on the right of the screen, click on it; then look for the the copyright theme name etc. Either delete the div tabs if any, or enter your own copyright content.
Make a copy of the footer.php before you change anything.
You might want to see if you have page re-direct switched on so that all pages are forwarded to your home page. Just an idea.
