I have a friend that went to a website and they said that there was old data on the site. When I went there I saw the new information. Why would this happen?
This can happen. The browsers can save information each time you visit a site. You can then tell the browser to use the old page. It may not be current. You can force the browser to refresh and get the latest page by hitting some special keys. Crtl+F5 for Chrome and IE, Command+F5 for the Mac Safari.
You can also set your browser to always get the current information. See the links on our web site on all of the special keys and how to set the browser. http://www.wikihow.com/Force-Refresh-in-Your-Internet-Browser.