Issue no.1 - Working as intended, as per the release information for v2.0.x:
I can take a look at a toggle that allows settings to be applied to ALL groups, like the old version, or on a per-group basis like the new version. UPDATE ON THAT: done.....that was a lot easier than it used to be. Glad I redeveloped this one from the mess it used to be 😄 .
Issue no.2 - show me the tab with the settings for the "certain group" and then send me a link to your site, along with login credentials for an account in that same group, please, so that I can check the code on the site. Let me know about this - if there is a bug then I can get it sorted for v2.0.2, along with the above new functionality.
I'll get around to updating the screenshots at some point (needs to be done at same time as submitting a new version) - they are based on the old plugin, not the new application.