Based on what I checked on your blog listing page, it did show the blank tweet icon now, you can check my attached screenshot below.
And I found out that Facebook share button missing is conflict with jfbconnect extension, it seems like they render those Facebook share button using 2.9 version :
<script type="text/javascript">
window.fbAsyncInit = function() {
FB.init({version: 'v2.9',appId: '385680758114232', status: false, cookie: true, xfbml: false});
FB.Event.subscribe('comment.create', jfbc.social.facebook.comment.create);
FB.Event.subscribe('comment.remove', jfbc.social.facebook.comment.remove);
};
(function(d, s, id){
var js, fjs = d.getElementsByTagName(s)[0];
if (d.getElementById(id)) {return;}
js = d.createElement(s); js.id = id;
js.src = "//connect.facebook.net/en_GB/sdk.js";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
</script>
And ours is using version 3.0.
Currently I am not really sure whether is because of the version or not, as long as when I disable this 'System - JFBCSystem' plugin, then that Facebook social share button appear on the blog listing page now.