Member deletion in eNewsletter

I cannot delete a member from the newsletter member list! I have tried all possible alternatives from the right hand 'Delete' button to selecting the member and using the bulk action via the bottom 'Delete' option.

I have network deactivated, activated, logged in again etc., etc., etc.

Getting very frustrated here as what should be a 30 second task has wasted at least 30 minutes so far.

David Wilks