Seam Identity, Duplicated Messages for the first time

[grdzeli_kaci]

hi all,
i have simple login page, i use seam identity,
here is my example :
1.view

<h:form id="login">
 <rich:panel style="width: 400px;">
 <f:facet name="header">Login</f:facet>
 <p class="LogintCaption">Please login using any username and password</p>
 <div class="dialog">
 <h:panelGrid columns="2" rowClasses="prop" columnClasses="name,value" style="text-align:left">
 <h:outputLabel for="username">Username</h:outputLabel>
 <h:inputText id="username"
 value="#{identity.username}" styleClass="LoginInput"/>
 <h:outputLabel for="password">Password</h:outputLabel>
 <h:inputSecret id="password"
 value="#{identity.password}" styleClass="LoginInput"/>
 <h:outputLabel for="language">Language</h:outputLabel>
 <h:selectOneMenu id="language" styleClass="LoginLangCombo" value="#{localeSelector.language}"
 onchange="submit();"
 valueChangeListener="#{localeSelector.select}">
 <f:selectItems value="#{localeSelector.supportedLocales}"/>
 </h:selectOneMenu>
 <h:outputLabel for="rememberMe">Remember me</h:outputLabel>
 <h:selectBooleanCheckbox id="rememberMe"
 value="#{identity.rememberMe}"/>
 <h:outputLabel for="LogInButn"></h:outputLabel>
 <h:commandButton id="LogInButn" value="Login" action="#{identity.login}"/>
 </h:panelGrid>
 </div>
 <h:messages id="modalError" layout="table" style="padding:0px;"/>
 </rich:panel>
 </h:form>

1. Backing bean :

@Name("authenticator")
public class Authenticator {
 // logger instance
 @Logger
 Log log;
 // Seam Identity Session Bean For User Identification
 @In
 Identity identity;
 // UserName Fro Session Context.
 private static final String USER_VAR = "currentUser";
 // Session Context
 @In
 Context sessionContext;
 // Database Entity Manager
 @In(value = "#{entityManager}")
 EntityManager em;
 // Faces Messages
 @In
 private FacesMessages facesMessages;

 public boolean authenticate() {
 try {
 facesMessages.clear();
 log.info("authenticating = " + identity.getUsername());
 List<Users> users = (List<Users>) em.createNamedQuery("Users.findByUserName").setParameter("userName", identity.getUsername()).getResultList();
 if (users == null || (users != null && users.isEmpty())) {
 facesMessages.addToControl("username", "User #{user.username} does not exists");
 //FacesMessages.instance().add("User #{user.username} does not exists");
 return false;
 } else {
 for (Users user : users) {
 byte dbpaswd[] = user.getUserPwd();
 String strpwd = identity.getPassword();
 MessageDigest md5 = MessageDigest.getInstance("MD5");
 md5.reset();
 md5.update(strpwd.getBytes());
 byte[] userpasswd = md5.digest();

 boolean result = MessageDigest.isEqual(userpasswd, dbpaswd);
 if (result) {
 identity.addRole("admin");
 sessionContext.set(USER_VAR, user);
 return true;
 }
 }
 }
 facesMessages.addToControl("password", "Incorrect Password For This User");
 //FacesMessages.instance().add("Incorrect Password For This User");
 return false;
 } catch (Exception e) {
 e.printStackTrace();
 facesMessages.add("Could not login. System Error");
 //FacesMessages.instance().add("Could not login. System Error");
 return false;
 }
 }
}

but for the first time i got two messages into view :

Incorrect Password For This User
Incorrect Password For This User

here is screen shot of my program :
[url=http://img2.freeimagehosting.net/image.php?69700131ef.png][img]http://img2.freeimagehosting.net/uploads/th.69700131ef.png[/img][/url]


any idea will be appreciated.
_______________________
Regards,
Paata.
Magticom LTD.