Hi Will,

Is there a way to hide the posts in the All Category listings and only show them on single category view?

At categories listing right now don't have function to disable it but it only can be done if you have make menu item type to (Categories) All Categories.

May i know do you don't want to show any post when viewing ALL categories it's
see my screenshort: http://screencast.com/t/gOAlgQvgMmwD

if yes you can add this CSS code:

/* hide the category listing post */

div#fd.eb .eb-categories .eb-category-stats {

    display: none !important;

}

in JoomlaFolder/templates/socialize/local/css/template.css

Hope this help.