Same results. I changed it in two places:
//comparison list additions
$WADbSearch2->keywordComparison($KeyArr1,"".("".(isset($_GET["WADbSearch2"]))?$_GET["WADbSearch2"]:"") ."","OR","Includes","%20AND%20","%20OR","%22,%20%22","%22%20%22",0);
$WADbSearch2->keywordComparison($KeyArr2,"".("".(isset($_GET["WADbSearch2"]) && is_numeric($_GET["WADbSearch2"]))?$_GET["WADbSearch2"]:"") ."","OR","=","%20AND%20","%20OR","%22","%22",1);
$WADbSearch2->addComparisonFromList("ID","itemchecked","AND","=",1);