Hi Elliot.
Thanks for your help.
I Tryed all of that:
removed the ‘post_not_in’ argument.
removed the type => ‘DATE’
the save_format setting is ‘yymmdd’
i updated the post and added some new one’s
i deactivated plugins
but unfortunately it still doesn’t filter.
By the way the order by date works fine.
I might try to redo the same situation with another wp theme, maybe thats where the issue commes from.