Granting a group access control to another group

We are running Groupwise 2014 R2 HP1
Basically I have a GroupWise group (IT Group) that I want to have access control over another Group (Site A Group) so they can modify it . In the admin console, under the Site A Group -> Access Control -> People who can Modify this Group, when I click on ADD it does give me the option to add a group, but after it has been added, it doesn't appear that the users in the IT Group have rights to modify this Group in the client.
Is this working as designed?