Don't find meta robots with index and follow

WordPress version: 3.5.1 MULTISITE
WordPress SEO version: 1.4.7

I did this: in the (home)page, I set up in the advanced tab :
-‘meta robots index’ = ‘index’
-‘meta robots follow’ = ‘follow’

I expected the plugin to do this: I wanted to find in the (homepage) HTML code : “<meta name=”robots” content=”index, follow” />”

Instead it did this: There is no meta robots in the HTML code.
Look here : http://www.arc-culture-bruxelles.be

Best regards,
Bernard.

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