Ok. I think there is a option that states that when a scheduled post is made it clears all the cache when it goes live. Let me ask to be sure that is exactly what it does and if we can restrict that to only clearing the home page or page that has the list of posts.
And, so I tell them your specific set up as it relates to your request, you have added code to the htaccess file that requests it clear the users browser cache on page load. Can you add your htaccess file here so I can send it with the question?
Thanks
Tim