I have installed the Youheadline demo site.
I have changed the "K2 News Items Ordering" to the "Most popular" item in the Youjoomla Module Engine. When I checked the ordering result, the ordering seems doesn't work by the K2 Popular items order.
What's the problem?
Are you sure your are posting in product assigned forum?
What is your CMS version?
: Joomla 2.5
Link to installation
: YouHeadline - Joomla! News Magazine
Have you edited any files? If yes tell us which ones.
Is this personal or client website?