Title bug on login page

Hi there,

I have an issue displaying the page title on one of the pages : http://www.commentcavole.com/questions/poser/

In order to display the titles on the other pages, I added the [anspress] shortcode both as the Page title and as the content of the page. As it didn’t work on its own, I also downloaded the “shortcode as title” plugin for wordpress.

That’s strange, because it looks to word better with Yoast running than without…

Thank you for your help,
Julien