recent update shows blog post intros of Level2 membership content

Hi,

After updating to the latest update of the membership plugin the intro (title and first 20 words) from the hidden blogs content are visible to visitors? All the negative settings for the blog categories and individual posts are correct, but still the intros stay visible?

http://www.cesartherapie.nl/blog

I've had this problem before, approx. 6 months ago. But don't know anymore how we've solved it.

Please advise !

Regards, Paul