title: Model Manager queryset not filtering
body: <p>I have a proxy model whose queryset is a subset of its parent. However, when I call it, the parent's objects are returned instead.</p>
  
  <p><strong><a href="https://docs.djangoproject.com/en/dev/topics/db/managers/#modifying-initial-manager-querysets" rel="noreferrer">Model Manager</a></strong>:</p>
  
  <pre><code>class NewRequestsManager(models.Manager):        
      def get_queryset(self):
          return super(NewRequestsManager, self).get_queryset().filter(is_scoped=0)
  </code></pre>
  
  <p><strong>Proxy Model</strong>:</p>
  
  <pre><code>class NewRequests(Engagement):
      objects = NewRequestsManager()
  
      class Meta:
          proxy = True
          app_label = 'myapp'
          verbose_name = 'New Request'
  </code></pre>
  
  <p><strong>View</strong>:</p>
  
  <pre><code>def list(request):
      new_requests = NewRequests.objects.all()
      c = RequestContext(request, {
              'cl': new_requests,
      })
      t = loader.get_template('queue.html')
      return HttpResponse(t.render(c))
  </code></pre>
  
  <p>Any help is much appreciated.  I'm not exactly sure what I'm missing here.</p>