First thing I would try: Disable "WP Super Cache" and see what happens.
If the posts are displayed correctly after disabling "WP Super Cache", then your issue is related to the cache plugin. Next thing to try is what I suggested earlier:
If you only need to empty cache of one page, when viewing this page while logged in, you will see a menu entry that reads: "Clear cache". This clears the cache of the page being displayed.
If the posts are not displayed correctly, the problem is elsewhere and you have to investigate further.
Hope this has helped.