Your efficient htaccess is not what located in main WordPress directory. It seems your server configured differently. It maybe disabled htaccess completely or changed it efficient location
I triad to upload .htaccess to www folder but your server doesn’t allow me to do that. I suggest to contact with your host company and describe the issue.
Just rename /www/wp/.htaccess or delete it, your posts and pages should be broken but they don’t. This means real htacces is somewhere else or htaccess is totally forbidden/ignored by server configuration.