duplicating content on pages

I'm having issue that some of the pages are posting the same content twice. I've cleared cache and still have issue. Here is example
http://www.iluvused.com/Cash-n-Carry/about-us.html

http://www.iluvused.com/New-Arrivals/

This issue is related with wrong cache configuration - please look at this article and configure your Joomla! cache like it is described >> http://www.gavick.com/documentation/joomla-extensions/extensions-for-joomla-1-6/gk-cahce-plugin/