Why is membership blocking all users from seeing directory listings & blocking advanced from all

Hi

I set up positive rules for my members, and ever since no users can view individual directory listings. What I mean by that is they cannot click on a directory listing to see full details about it, yet they can see the preview. Why would this be?

Also, advanced users cannot see anything it seems. They appear to be getting the protected content notice even when trying to access the home page!

Please can someone take a look? I've enabled support access.

Would using negative rules only be easier rather than positive? In this case would everything just be accessible to all users unless I specifically blocked it?

Thanks

Sally