Membership plugin - cookie issue?

Following up on my earlier post about use of the membership plugin on ...

Seems like sometimes it works, sometimes it doesn't. I've noticed that when I'm logged in as Anco (password: clavier6 for testing purposes) I can see the right pages now (level 1 - go to Members in the nav bar to log in and access each level) but when I log out I can still see the level 1 pages, even theoretically they should divert to the No Access page for a stranger (free user). Not sure if this is what's causing it to seem like it's working intermittently.

Really struggling and have the client at my neck :wink: