couple of problems:
1) Date elements do not work properly with using includes as the search
2) The date form you had for the data added search form element was not valid, i changed it to use mm/dd/yyyy
so to get around the issue with dates and like searches, I changed the search type to = and added code to format the date:
$WADbSearch1->addComparisonFromEdit("DATE_FORMAT(DateAdded, '%Y-%m-%d 00:00:00')","DateAdded","AND","=",2);