Post Page Conflict

Hi

when i enable the plugin i get conflict on the post section, the space appears large i cannot edit, modify existing post

Before seo yoast activate:
https://www.dropbox.com/s/jf3grum76orivs5/Screenshot%202014-08-05%2013.35.19.png

After seo YOAST Activated
https://www.dropbox.com/s/151e5u5cfl5lkec/Screenshot%202014-08-04%2023.14.19.png

I have yoast the latest version installed.

https://wordpress.org/plugins/wordpress-seo/