csm0513,
As long as no filters or queries are causing only User Stories to be displayed, both User Stories and Defects should be showing up.
If you do not have any filters or queries set up on the Kanban Board and you are not seeing what you expect, please open a case with the Support Team by clicking on the 'Support' link at the bottom of the page or the 'Contact Support' link under the question mark in the upper right corner if using Personalized Navigation in Agile Central.
Michael