Jetpack sharing images not displaying

I’ve just installed jetpack on my new blog.

I’ve turned on the sharing feature, enabled the services I want to be displayed and I’ve set the default button style to ‘icon + text’.

However, instead of displaying in a nice line like the ‘live preview’ in the dashboard the links are displayed in a bulleted list, with no images displayed apart from the twitter one.

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Link to site: http://www.mutyakeishasiobhan.net/

Does anyone know how I can fix this? Many thanks.