When you are using the Visual or Text editors, available in the File Manager, you changes are available to the internet immediately after you save. It is common not to see the changes immediately, due to your browser's cache. Try forcing two or three browser refreshes (F5 or Ctrl-R). This will force your browser to get fresh data from your web site, and show you your changes.
It appears that your web site was originally a Website Wizard Theme. But you are now editing it with a different editor, probably the Visual editor in the File Manager. The Visual editor has the unique ability to delete tags, which Wizard Themes are very dependent on. It is not recommended that you edit a Wizard Theme from anywhere, except within the Wizard. Those who have tried it usually wind up with a disaster. If you don't want to use the Wizard, that's fine, but you might want to try this link to my help page on Working With Bravenet Templates. The page on Template Editing has links to several good free web page design applications.
