Duplicate Technician Group names after upgrade

We recently upgraded from ServiceDesk Plus 8.0.0 Build 8005 to 8011 as well as moved the application and data to a new server. We have encountered a problem where users will access a Request and attempt to assign the request using the available toolbar. When attempting to choose group from the “Assign Group and Technician” form, the “Choose Group” dropdown menu is showing multiple duplicate entries. For example:

Choose Group: Incoming Email Tickets

IT Secure

Web Group

ServiceDesk

This problem only appears to reside in selecting a group via this method. If users attempt to edit the request and select a group via “Request Details” then each group only shows once and there is no problem. Has anyone encountered this problem? Any known issues? How can we fix it? Any help is greatly appreciated.