jquery clone() + selectType() [funcionando]

Clonar uma div de código html do cakephp, onde cada div possui um combobox, selecionando-o, deveria abrir apenas a div correspondente, mas está abrindo as demais.

by Francis Rodrigues

HTML

<div id="SiteHydroDiv">
    
    <div class="group">
        <input name="data[SiteHydro][0][id]" value="7" id="SiteHydro0Id" type="hidden">
        <div class="header">Estação</div>
        <div class="fields">
            <div class="required">
                <label for="SiteHydro0Name">Nome da estação</label>
                <input name="data[SiteHydro][0][name]" maxlength="255" value="Estação 1" id="SiteHydro0Name" type="text">
            </div>
            <div class="required">
                <label for="SiteHydro0HydroTypeName">Tipo de estação</label>
                <select name="data[SiteHydro][0][hydro_type_name]" id="SiteHydro0HydroTypeName" class="selectHydro" alt="0">
                    <option value="0">Selecione...</option>
                    <option value="seiom" selected="selected">Seiom Informática</option>

                </select>
            </div>
        </div>
        <div id="hydro_type_seiom" class="seiom_class_0">
            <div class="fields">
                <div class="required">Seiom Informática</div>
                <input name="data[SiteHydro][0][SiteHydroSeiom][id]" value="7" id="SiteHydro0SiteHydroSeiomId" type="hidden">
                <div class="required">
                    <label for="SiteHydro0SiteHydroSeiomEmail">Email</label>
                    <input name="data[SiteHydro][0][SiteHydroSeiom][email]" value="[email protected]" id="SiteHydro0SiteHydroSeiomEmail" type="text">
                </div>
            </div>
        </div>
    </div>
    
    <div class="group">
        <input name="data[SiteHydro][1][id]" value="8" id="SiteHydro1Id" type="hidden">
        <div class="header">Estação</div>
        <div class="fields">
            <div class="required">
                <label for="SiteHydro1Name">Nome da estação</label>
                <input name="data[SiteHydro][1][name]" maxlength="255" value="Estação 2" id="SiteHydro1Name" type="text">
            </div>
            <div class="required">
          ...

CSS

.header {
    font-weight:bold; font-family:verdana; font-size:14px;
}
.fields {
    font-weight:normal; font-family:arial; font-size:12px;
}
li span {
    cursor:pointer;
    font-weight:normal; font-family:arial; font-size:12px;
}

JavaScript

$(document).ready(function () {
    
    function selectType(o, p) {
        val = o.val();
        if (val) {
            $("div[id^=\'" + p + "\']").each(function() {
                if ($(this).val() != val) {
                    $(this).hide();
                }
            });
            
           $("select").each(function() {
                var valor = $(this).val();
                var classVal = valor + "_class_" + $(this).attr('alt');
                if (valor != 0) {
                    $('.' + classVal).show();
                } else {
                    $('.' + classVal).hide();
                }
            });
            
        }
    }
    
    // Funcao jquery clone
    $("#SiteHydroDiv").each(function(){
        var idx = $('#SiteHydroDiv > .group').size();
        var action = '<div class="actions"><ul style="float: left;"><li><span class="delete" id="undoHydro">Desfazer</span></li></ul></div>';
        var group = $("#SiteHydroDiv .group:first").clone();
        $('#addHydro').live('click', function(){
            var group = $("#SiteHydroDiv .group:first").clone();
            $(group)
            .find("input[type=hidden]").each(function(){
                $(this)
                .attr("id", $(this).attr("id").replace("0", idx))
                .attr("name", $(this).attr("name").replace("[0]", "[" +idx+ "]"));
                $(this).val( $(this).val().replace(/^[0-9]+$/,"") )
            })
            .end()
            .find("label").each(function(){
                $(this).attr("for", $(this).attr("for").replace("0", +idx));
            })
            .end()
            .find("input").each(function(){
                $(this)
                .attr("id", $(this).attr("id").replace("0", idx))
                .attr("name", $(this).attr("name").replace("[0]", "[" +idx+ "]"))
                .attr("value", "")
            })
            .end()
            .find("select").each(function(){
                $(this)
               ...