Blog posts still show despite being on restricted list

Actually, it’s almost certainly crept in through an update to one of your other plugins.

Try deactivating them, and changing to the 2014 theme, and see if it works then. If so, add them back in by one one to find the culprit.

Thanks for your prompt response.

The problem seems to be a conflict with s2Member and W3 Total Cache. If I deactivate W3 Total Cache, the problem goes away.

Has this conflict been reported before?

Then you haven’t got W3 set up correctly.

The general rule is that you cannot cache content for logged-in users. That’s nothing to do with s2member specifically. That applies to WordPress generally.

So you have to set up W3 to avoid caching posts and pages that are for logged-in users.

This is one of the reasons I absolutely hate W3. Too many settings, too few instructions, and some bad practices (like fiddling with the .htaccess file).

There are several better alternatives that are free.

However, if you really do want to cache content for logged-in users, you need to use Quick Cache Pro (by the same developers as s2Member). You can set that to create a separate cache for each logged-in user, which will avoid all the usual problems. It costs $15 for an unlimited number of sites.