I encountered this small problem on E-newsletter groups.
For logged in users there is an button for them to subscribe to the newsletter. But after pressing the button it shows available groups to subscribe into. I feel this is redundant and I don't want to display the list of groups to any user. They should by default be in the main subscribers group.
I already checked the Default Groups option in settings but it seems not working.
Screen shots are attached.
Highly appreciate any help.