So if you don't "refresh" after changes have been made, your computer might be readying the older version stored in your cache memory and that's why you can't see the new updates!
HOW TO REFRESH YOUR BROWSER: Just click the "refresh" or "reload" arrow button ⟳ at the top of your browser window so that it will load the most recent changes.
How do I refresh my browser
If that still does not work, you might have to try a "force refresh" which will cause the browser to re-check with the web server to make sure it has the latest copy of the web page you are viewing. Just hit the control (Ctrl) and F5 button at the same time (Windows). Or, if you are using a Mac - Apple + R or Cmd + R.
Still not working? You may have to clear your browser's cache. Choose your browser from this list: http://www.wikihow.com/Clear-Your-Browser's-Cache and follow the instructions!