ZK Button is caled Twice

<?xml version="1.0" encoding="UTF-8"?>
<?page id="zkAccount"?>
<?taglib uri="http://www.zkoss.org/dsp/web/core" prefix="c"?>
<?init class="org.zkoss.zkplus.databind.AnnotateDataBinderInit" arg0="./cAcct"?>
<?taglib uri="http://www.zkoss.org/zkspring/security" prefix="sec"?>
<?variable-resolver class="org.zkoss.zkplus.spring.DelegatingVariableResolver"?>

<zk>
<window border="none" width="100%" id="cAcct" apply="com.zebra.zls.controller.AccountController" xmlns:zk="http://www.zkoss.org/2005/zul">
<h:form xmlns:h="http://www.w3.org/1999/xhtml">
		<toolbar align="end">
	<div height="23px">
	
	<zk if="${sec:isAllGranted('ROLE_ADMIN')}">
   		<button id="new" type="button" label="New"></button><space width="10px"></space><button id="edit" type="button" label="Edit"></button>
		<space width="10px"></space><button id="password" type="button" label="Password"></button><space width="10px"></space><button id="delete" type="button" label="Delete"></button>
	</zk>	
	
	</div>
	</toolbar>
		
		<zk:listbox id="accountsList" model="@{cAcct$composer.accounts}" selectedItem="@{selected}" style="height:400px">
		         <zk:listhead sizable="true">
		                  <zk:listheader label="User Name" />             
		                  <zk:listheader label="Last Name" />             
		                  <zk:listheader label="First Name" />
		                  <zk:listheader label="Email"  />
		                  <zk:listheader label="Role"  />
		                  
		         </zk:listhead>
		                         
                 <zk:listitem self="@{each=account}">
                              <zk:listcell style="text-align: left" label="@{account.userName}" value="@{account.userName}"/>
                              <zk:listcell style="text-align: left" label="@{account.lastName}" value="@{account.lastName}"/>
                              <zk:listcell style="text-align: left" label="@{account.firstName}" value="@{account.firstName}"/>
                              <zk:listcell style="text-align: left" label="@{account.email}" value="@{account.email}"/>
                              <zk:listcell style="text-align: left" label="@{account.role}" value="@{account.role}"/>
                 </zk:listitem>     
		</zk:listbox>  

		<window title="Updating User Account" id="popup" apply="com.zebra.zls.controller.AccountController" border="normal" position="center">
			<h:form xmlns:h="http://www.w3.org/1999/xhtml">
				<grid width="400px">
				  	<rows>
					    <row>User Name <textbox id="usrName" name="usrName" value=""/></row>
					    <row>Password <textbox id="pass" type="password" name="pass" value=""/></row>
					    <row>Confirm Password <textbox type="password" id="confPass" name="confPass" value=""/></row>
					    <row>Last Name <textbox id="lstName" name="lastName" value=""/></row>
					    <row>First Name <textbox id="frstName" name="firstName" value=""/></row>
					    <row>Email <textbox id="email" name="email" value=""/></row>
					    <row>Role
					    <radiogroup id="userSelection">
					                    <radio value="ROLE_ADMIN" label="Admin" />
					                    <radio value="ROLE_USER" label="User" />
					     </radiogroup>    	       
					    </row>
					    <row spans="2" style="text-align: right;">
					  	  <button style="display:none" type="button" id="adduser" label="Add User"/>
					  	</row>
					    <row spans="2" style="text-align: right;">
					  	  <button style="display:none;" type="button" id="update" label="Update User"/>
					  	</row>
					</rows>
				</grid>
			</h:form>
		</window>
</h:form>		
</window>

</zk>

import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.xml.bind.JAXBException;

import org.zkoss.zhtml.Messagebox;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.ForwardEvent;
import org.zkoss.zk.ui.util.GenericForwardComposer;
import org.zkoss.zkplus.databind.AnnotateDataBinder;
import org.zkoss.zul.Button;
import org.zkoss.zul.ListModel;
import org.zkoss.zul.Listbox;
import org.zkoss.zul.Radio;
import org.zkoss.zul.Radiogroup;
import org.zkoss.zul.Textbox;
import org.zkoss.zul.Window;


public class AccountController extends GenericForwardComposer { 

	
	private static final long serialVersionUID = 1L;
	private List<AccountBean> _accounts = new ArrayList<AccountBean>();
	private AnnotateDataBinder binder;
	private Listbox accountsList;
	private Window popup;
	private Textbox usrName;
	private Textbox lstName;
	private Textbox frstName;
	private Textbox email;
	private Textbox confPass;
	private Textbox pass;
	private Button update;
	private Button adduser;
	private Radiogroup userSelection;
	private Window cAcct;
	
	public AccountController() throws Exception{
		this.returnAllAccounts();
	}
	
	@Override
	public void doAfterCompose(Component comp) throws Exception {
		super.doAfterCompose(comp);
	}
	
	public void onCreate$cAcct(ForwardEvent event) {
		binder = (AnnotateDataBinder) event.getTarget().getAttributeOrFellow("binder", true);
	}
	
	public void onCreate$popup(ForwardEvent event) {
		
		binder = (AnnotateDataBinder) event.getTarget().getAttributeOrFellow("binder", true);
		usrName = (Textbox) popup.getFellow("usrName");
		lstName = (Textbox) popup.getFellow("lstName");
		frstName = (Textbox) popup.getFellow("frstName");
		email = (Textbox) popup.getFellow("email");
		confPass = (Textbox) popup.getFellow("confPass");
		pass = (Textbox) popup.getFellow("pass");
		update = (Button)popup.getFellow("update");
		adduser = (Button) popup.getFellow("adduser");
		userSelection = (Radiogroup)popup.getFellow("userSelection");
	}
	public String fixString(String orgStr){
		if(orgStr == null)
			return "";
		else
			return orgStr;
	}
	public List<AccountBean> returnAllAccounts() throws Exception {
		
			return _accounts;
	}

	
	public void onClick$new(Event event){
		
		popup.doPopup();
		
		//Empty all Text boxes to fill New user data..
		usrName.setText("");
		pass.setText("");
		confPass.setText("");
		lstName.setText("");
		frstName.setText("");
		email.setText("");
		userSelection.setSelectedIndex(1);
		
		usrName.setReadonly(false);
		pass.setReadonly(false);
		confPass.setVisible(true);
		confPass.setReadonly(false);
		
		update.setStyle("display:none");
		adduser.setStyle("display:block");
		popup.setStyle("display:block");
		
	}
	
	public void onClick$edit(Event event) throws Exception{
		String username = null;
		if(accountsList.getSelectedItem() != null)
			username = accountsList.getSelectedItem().getLabel();
		else
			Messagebox.show("Please select any row from the list below and press edit.");
		
		if(username != null){
		
			popup.doPopup();
			usrName.setReadonly(true);
			pass.setReadonly(true);
			confPass.setVisible(false);
			
			AccountBean selectedItem = getAccountBean(accountsList.getSelectedItem().getLabel());
			
			usrName.setText(selectedItem.getUserName());
			pass.setText(selectedItem.getPassDigest());
			confPass.setText(selectedItem.getPassDigest());
			lstName.setText(selectedItem.getLastName());
			frstName.setText(selectedItem.getFirstName());
			email.setText(selectedItem.getEmail());
			
			for(Iterator<Radio> itRadio = userSelection.getItems().iterator(); itRadio.hasNext();){
				Radio radio = itRadio.next();
				if(radio.getValue().equalsIgnoreCase(selectedItem.getRole())){
					userSelection.setSelectedItem(radio);
				}
			}
			this.updateAccount();
			update.setStyle("display:block");
			adduser.setStyle("display:none");
			popup.setStyle("display:block");
		}	
	}
	
	public void onClick$delete(Event event) throws Exception{
		String username = null;
		if(accountsList.getSelectedItem() != null)
			username = accountsList.getSelectedItem().getLabel();
		else
			Messagebox.show("Please select any row from the list below and press delete.");
		
		if(username != null){
			if(delete(username).equalsIgnoreCase("SUCCESS")){
				this._accounts.clear();
				this.returnAllAccounts();
				binder = new AnnotateDataBinder(accountsList);
				binder.loadComponent(accountsList);
				Messagebox.show(username+" successfully deleted from Account");
			}else{
				Messagebox.show("Error Occurred while deleting account..."+username);
			}
		}
	}
	
	public void onClick$update(Event event){
		
		popup.setStyle("display:none");
	}
	
	public void onClick$adduser(Event event) throws Exception{
		
		this._accounts.clear();
		addAccount();
		this.returnAllAccounts();
		binder.loadAll();
		popup.setStyle("display:none");
	}
	
	public String delete(String username) throws FileNotFoundException, JAXBException {
		return "SUCCESS";
	}
	
	private String addAccount() throws FileNotFoundException, JAXBException {
		return "SUCCESS";
	}
	
	public String updateAccount() throws FileNotFoundException, JAXBException {
		// find account
		System.out.println("I am now going to Update Account");
		return "SUCCESS";
	}
}