Security Groups and Credentials

I am using a SQL Server data source. When I attempt to assign a security group to a folder under the "Credentials" section, it creates a new empty folder with the same name under the "Sessions" section, and assigns the security group to that folder. Then, if I try to delete the extra folder under "Sessions," the UI also deletes the original folder under "Credentials." Finally, if I restart the application, the original folder under "Credentials" reappears.