Overview:
The Acknowledgement of Content (AOC) Items related list from the AOC page is not displaying columns based on the Content_Acknowledgement_vod layouts related list.
Root Cause:
AOC opens the Content_Acknowledgement_View_vod Visualforce (VF) page rather than a standard SalesForce.com (SFDC )page. The Visual Force (VF) page AOC Items section is based on the AOC Item page layout rather than the related list of the AOC.
Solution:
Configure the page layout of AOC Item to display the desired fields on the AOC page.
Related Documentation:
CRM Help Documentation: Acknowledgement of Content