Doctrine 2 issue inside Zf2 Navigation - strange issue - orm

Question

I can use doctrine from all my controller without any problem
$em = $this->getServiceLocator()->get("doctrine.entitymanager.orm_default");
$newsItems = $em->getRepository('Website\Entity\News')->findAll();
foreach($newsItems as $item)
// do stuff here
Preamble: if I use Zend\Db\Adapter instead of Doctrine the following work as aspected !
I'm inside a MyNavigationObject that was instanciated by MyNavigationFactory.
I have a mysql table called mainmenu with 4 records: home,news,company,contact
I would like to do my own navigation with Doctrine-Orm.
Also I have an entity called Mainmenu.
I can call the entityManager and the results is composed with 4 records but 4 times the records number 1. Incredible !
this is the code:
protected function getPages(ServiceLocatorInterface $serviceLocator)
{
if (null === $this->pages) {
$em = $serviceLocator->get("doctrine.entitymanager.orm_default");
$menuItems = $em->getRepository('Website\Entity\Mainmenu')->findAll();
//return default key
$configuration['navigation'][$this->getName()] = array();
foreach ($menuItems as $menuItem)
{
$configuration['navigation'][$this->getName()][$menuItem->getName()] = array(
'label' => $menuItem->getLabel(),
'route' => $menuItem->getRoute(),
'controller' => $menuItem->getController(),
);
}
if (!isset($configuration['navigation'])) {
throw new \Exception\InvalidArgumentException('Could not find navigation configuration key');
}
if (!isset($configuration['navigation'][$this->getName()])) {
throw new Exception\InvalidArgumentException(sprintf(
'Failed to find a navigation container by the name "%s"',
$this->getName()
));
}
// refer to Mvc::Application object not to modulename
$application = $serviceLocator->get('Application');
$routeMatch = $application->getMvcEvent()->getRouteMatch();
$router = $application->getMvcEvent()->getRouter();
$pages = $this->getPagesFromConfig($configuration['navigation'][$this->getName()]);
$this->pages = $this->injectComponents($pages, $routeMatch, $router);
}
return $this->pages;
Can anyone provide suggestions or reproduce the issue ?
bye