[Plugin: WordPress SEO by Yoast] SEO title

Hi.
I’ve have had so many problems with wordpress seo title.
1. It happened that when i force title to rewrite nothing happens.i mean old titles have not changed.it there query to run to update titles?
2. take a look at the picture bellow
http://up.pershiandon.com/images/wcwiwc2jnrw4myzgb7kp.png
(( » )) i don’t get where this came from?
i checked everything

http://wordpress.org/extend/plugins/wordpress-seo/

[ Please do not bump, that’s not permitted here. ]