Button order can only be changed manually by editing the template 'SV_rrssbShares'. The template is clearly commented with START and END comments for each button. If you need help please post any questions in the resource discussion thread.
Can I change the style of the buttons?
Yes, there are basic style properties available within your style. For more advanced styling you can edit the CSS in the template 'SV_rrssbDefault.css'
Why do Facebook shares have the user avatar when posted?
To remove the avatar og:image meta data, remove this line from the template "open_graph_meta".