BPH, it depends on what browser you use and the settings. It's your browser that decides to go back to a cached page instead of looking to see if it's changed. I have MSIE and this is how I do it:

Tools/Internet Options - General tab
Under 'Temporary Internet Files' click the button for 'Settings'
Under 'Check for newer versions of stored pages' -
I have 'Automatically' marked, and it works fine.
Then click OK until all the boxes are closed.

There's a link to the Help Forum way up at the top. The folks who can help with technical stuff don't read every thread, but they DO check into the Help Forum often.