Catch all doesn't work for super administrator

Catch all doesn't work for super administrator

In Spam Control, if i attempt to enter the super admin's email id to be the catch all, or notification for that matter, i get an error that the user is not part of the organization.  If i try to invite the super admin to the organization, i get an error that the user is already in the organization.  Am i doing something wrong?

I also tried a workaround by creating a group, and assigning that group as the catchall, which works, EXCEPT that i cannot add the superadmin to the group.  Is this intentional?  It seems odd that the super admin can't be a member of the organization the he admins.

How did anyone else get this to work?