As both Internet Explorer and Safari save, as "temporary Internet files", copies of previously viewed Internet pages to speed access and decrease Internet traffic, it may sometimes be that what you see on your screen is not the latest version of a given page, but just one surreptitiously stored on your hard drive by your browser when you saw it earlier. If you suspect that what you see is out of date try the following.
First you could simply try refreshing the page, but if this does not work:
In Internet Explorer either click on Tools on the menu bar or Tools in the options given alongside the tabs. Then, from the drop down menu, select Delete Browsing History. A box will appear, there, in Temporary Internet Files click Delete files. Close the box. Once this is complete refresh the screen.
In Safari select Empty Cache from the Edit drop down menu. Click on empty when it asks if you are sure. Again, once done, refresh the screen.
Of course if the page is out of date then there is nothing you can do except to point out its obsolescence by sending its maker a message. Something along the lines of that of Arthur Mow.