Whatsapp icon showing only in first post in frontage

I am pretty impressed in this whatsapp plugin and it is working great as expected. My only problem is that, I enabled these to display in front (index) page. But when I am checking in my mobile, it is displaying only in first post. The rest of posts, it is not displaying whatsapp icon. I removed plugin and reinstalled again, but no change. url: http://jokestotext.com

https://wordpress.org/plugins/whatsapp-jetpack-button/