Cache showing old posts

[henkdekoning]

Hi all,

I am using quick cache for some time and loving it!

Since (couple of months?) I noticed then when I visit my site it does not show the latest posts anymore for not logged in users = cached users). I create many posts one time a week (month) and schedule them all.
I have the cache expiration time fairly high at 604800 secs because of my load of some 50K visitors a day.
I have set the sitemap auto caching to the right url and the sitemap is created by an plugin (working).
I have set Dynamic Cache Pruning to single+frontpage.

So I would say the settings are ok, right?

Still when I look at my site now I see posts of a couple days old. When I edit (change one letter) a post which should have been visible and update that then the plugin works and instantly shows all posts.

Where does it go wrong?

I enabled the internal debugging? Is there a log I should post?

Hopefully somebody can help me out.

ps: own server, uptodate WP and plugins

[henkdekoning]

Nobody any clue?