Search:

this could sounds like, you are using a cache plugin, in that case, make sure to allow the cookie called: cc_loggedin

My opinion: Admins only!
Best regards,

Agree on spymare!
Regards,

http://forums.appthemes.com/wordpress-search-engine-optimization-plugin-%7C-xml-11073/

yoast seo plugin, the only best one ;).

it's the index.php in root not in the includes file.

the file is index.php in your theme folder.