Django admin does not show all entities

I've inherited an app created with Django. There is a problem with it: in admin interface, the page lists not all entities (videos), but some (16 of 25). I have no idea, what is this. Then I run `python manage.py shell`, and there `Video.objects.all()`, there are all 25 objects (counted them using `len` and by iterating them with `for` loop). I have found no managers or whatever (maybe I just don't know where to look for them). On the bottom of admin page: `25 videos`, while there are only 16 rows. Then I add to VideoModelAdmin class `list_per_page = 10`, paginator show three pages, but only first two of them has any Videos, third shows no rows. Here are some code. ``` # admin.py class VideoModelAdmin(admin.ModelAdmin): list_display = ['title', 'short_desc', 'author', 'redactor_choise', 'views_num', 'rating', 'is_published'] list_filter = ['is_published', 'redactor_choise'] list_per_page = 10 actions = ['make_published', 'update_comments_count'] exclude = ('file_lq', 'file_hq', )#'thumb',) def make_published(self, request, queryset): queryset.update(is_published=1) make_published.short_description = "Опубликовать выделенные" def save_model(self, request, obj, form, change): instance = form.save(commit=False) instance.author = request.user instance.save() return instance def update_comments_count(self, request, queryset): for video in queryset: video.update_comments_count() update_comments_count.short_description = "Пересчитать комментарии!" # later there admin.site.register(Video, VideoModelAdmin) # models.py class Video(models.Model): def make_upload_path(instance, filename): return 'video/thumbs/' + generate_random_name(filename) category = models.ManyToManyField(Category, limit_choices_to = {'is_published': 1}) title = models.CharField(max_length=128) short_desc = models.CharField(max_length=255) long_desc = tinymce_models.HTMLField(blank=True) file_lq = models.FileField(upload_to='video/lq/', null=True, blank=True) file_hq = models.FileField(upload_to='video/hq/', null=True, blank=True) thumb = models.FileField(upload_to=make_upload_path, blank=True, null=True) #thumb = fields.ThumbnailField(upload_to=make_upload_path, sizes=settings.VIDEO_THUMB_SIZE, blank=True, null=True) author = models.ForeignKey(User, editable=False) redactor_choise = models.BooleanField(default=False) views_num = models.SmallIntegerField(default=0, editable=False) comments_num = models.SmallIntegerField(default=0, editable=False) rating = models.SmallIntegerField(default=0, editable=False) voters = fields.PickledObjectField(blank=True, editable=False) created = models.DateTimeField(auto_now_add=True) is_published = models.BooleanField(default=False) def get_absolute_url(self): return "/video/%d" % self.id def views_num_plus(self): cursor = connection.cursor() cursor.execute('update soctv_video set views_num=views_num+1 where id=%d', [self.id]) cursor.close() def update_comments_count(self): from threadedcomments.models import ThreadedComment as Comment self.comments_num = Comment.objects.filter(video=self).count() self.save() #cursor = connection.cursor() #cursor.execute('update soctv_video set comments_num = (select count(*) from soctv_comment where video_id = %s) where id = %s', [self.id, self.id]) #cursor.close() def update_categories_counts(self): cursor = connection.cursor() cursor.execute('update soctv_category set num_items = (select count(*) from soctv_video_category where category_id = soctv_category.id)') cursor.close() def is_user_voted(self, uid): try: if self.voters[uid]: return self.voters[uid] except Exception: return False def increment_view_count(self, token): import md5 token = md5.new(token).hexdigest() if VideoView.objects.filter(uniquetoken=token).count() == 0: VideoView(uniquetoken = token, video = self).save() def view_count(self): return self.views_num + VideoView.objects.filter(video=self).count() def __unicode__(self): return unicode(self.title) ```