Hi there,
Demo should not cause this. Check your settings from Settings > General and see what’s set as your site and WordPress URL.
If you think everything is right; would you mind providing us with login credentials so we can take a closer look? To do this, you can make a post with the following info:
– Link to your site
– WordPress Admin username / password
– FTP credentials
Don’t forget to select Set as private reply. This ensures your information is only visible to our staff.