This was covered in another thread. It appears that the board's nocache parameter isn't working. Usually on a message board like this one the code forces browsers not to cache data. But for some reason ECF is being cached. That's why you're seeing old versions of the pages sometimes.
The temporary solution until someone fixes it is to either turn off caching in your browser or do a "super refresh" (hold down the shift key while clicking reload) each time you view a page.