Php Notice on top & Frontpage not displaying Featured articles...

I've read through multi forms and I can't get rid of the php notice on top when I enable the registration module. How do I go about doing this. Another question is why does it no showup on the quickstart version but does when I do a fresh Joomla install and then install the template.

I'm also getting Wrong group background when I go to use the Photo-slide k3. It doesn't matter with either one being selected and everything else filled out it sill shows with this error.

Still not sure how to get rid of the PHP notice on top. I did figure out the frontpage...setting in the template manager of black & white. Still not sure about the slide though. Any help on this would be great! Thanks!