hey Andrew,

1) Social buttons overlapping

I've applied some css fix in this file -> JoomlaFolder/templates/tx_zenith_ii/css/template.css

div#fd.eb .is-small .eb-share-facebook .facebook-like {

    width: 158px !important;

}

It should work fine now.

2) Rating stars not displaying properly

Regarding this issue, I can't reproduce in your site, you can take a look of my video here : http://screencast.com/t/BJXfLRSOy