In your WordPress Plugin Settings, in ShareThis Plugin Configuration menu on STEP-6, there is an option to edit the code under “View & edit code:”
In the code shown, you can add the properties like “st_title” and “st_via” to specify the Title and Twitter Handle.
Here is a screenshot – http://screencast.com/t/g70Ga55fA
I found this section but no matter what I change there is no difference. I changed the line to this: <span st_via='Tearfund' st_title='I just found <?php the_title(); ?>' st_url='<?php the_permalink(); ?>' class='st_twitter_large' st_summary='<?php the_excerpt(); ?>'></span>
http://whollyliving.tftech.org.uk/
When I hit the tweet button all I still get is this:
Home - Wholly Living http://shar.es/1XNcAG via @Tearfund
As we can check your site, it seems that you have ShareThis Sidebar selected and no ShareThis buttons are present. Please note that the code you are referring to – will only work for ShareThis buttons and not for bars. Please let us know the page URL if you have individual buttons are implemented so that we can further assist you.