I used the following code to Create a Group.

GroupInfo GI = new GroupInfo();
GI.Name = "Admin Full";
GI.Session = RASession;
GI.Description = "HR Reviewers";
GI.FeatureRights = FeatureRights.All;
GI.Privileges = Privileges.All;
GI.Save();

So the following Feature Rights and Privileges

Without granting any Access Rights in the Repository Users in this created group have the following permissions to a Folder in the based on their Feature Privileges which is expected.

I  realized a group I created using Workflow SDK should not have any Feature Privileges. So I changed to the following.

However this Group still has Access Rights Granted ( keep in mind no Access Rights were Assigned to this Group for this Folder )

If I create the same group through Admin Console Add and them Remove All Feature Privileges they will no longer have any Access Rights as expected.

Does using Privileges.All grant the Group a Built-In Admin like privilege?

As I created a Group with SDK having only FeatureRights.Full. When I use Admin Console to add and remove Feature Privileges it behaves as expected.

All Feature Privileges

No Feature Privileges

Can this be Group be changed  so it does not have an umbrella Buil-In like privilege?