Web app display order according to weight not working

[SproutCreatives]

I have a jquery slider displaying my web app event items. I am having problems with the ordering to be weightreverse so that the event are in order according to date. For weight I am using this date format "20140102"

Here is the code I am using for the slider

{module_webapps,19153,c,65789,weightreverse template="/Layouts/WebApps/[Content] Event Listings/list_hero.tpl"}

Here is the live website: http://www.wicomicociviccenter.org if you care to see it in action.

Any ideas would be appreciated.