I found the problem is that the list must be updated so that the Bean is the same as the selected list.

public List<Cargo> getCargos() {
          cargos = seamDatabase.createCriteria(Cargo.class).list();
          return cargos;
     }

Previous

public List<Cargo> getCargos() {
                if (cargos == null)
             cargos = seamDatabase.createCriteria(Cargo.class).list();
          return cargos;
     }