Class Table Inheritance - wrong table order on insert with more than one level of inheritance

$newEmployee = new Users_Entity_Model_Employee;
//here i set the data
.....

$em->persist($newEmployee);
$em->flush();

/**
 *
 * @Entity
 * @InheritanceType("JOINED")
 * @Table(name="Contacts")
 * @DiscriminatorColumn(name="contactType", type="string")
 * @DiscriminatorMap({"PERSON" = "Users_Model_Entity_Person", "COMPANY" = "Users_Model_Entity_Company", "EMPLOYEE" = "Users_Model_Entity_Employee", "FIRM" = "Users_Model_Entity_Firm"})
 */
class Users_Model_Entity_Contacts 
{


	/**
	 *  @Id  @Column(name="contactID", type="integer")
	 *  @GeneratedValue(strategy="AUTO")
	 *
	 */
	protected $contactID;

	// ...

}

/**
 *
 * @Table(name="Persons")
 * @entity(repositoryClass="Users_Model_PersonRepo")


 */
class Users_Model_Entity_Person extends Users_Model_Entity_Contacts
{
 // ...
}




/**
 *
 * @Table(name="Employees")
 * @entity
 */
class Users_Model_Entity_Employee extends Users_Model_Entity_Person
{
	// .....
}