Aggregator views do not sort on timestamp

Triaging.

You opened this issue in the Drupal core queue, for an issue that seems to be a Views issue. I just reassigned your issue in the proper queue so that one of the Views maintainers can look into it.

This works as expected for me, here is an export of the view i tested with

$view = new view;
$view->name = 'aggregator';
$view->description = '';
$view->tag = 'default';
$view->base_table = 'aggregator_item';
$view->human_name = 'aggregator';
$view->core = 7;
$view->api_version = '3.0';
$view->disabled = FALSE; /* Edit this to true to make a default view disabled initially */

/* Display: Master */
$handler = $view->new_display('default', 'Master', 'default');
$handler->display->display_options['title'] = 'aggregator';
$handler->display->display_options['access']['type'] = 'none';
$handler->display->display_options['cache']['type'] = 'none';
$handler->display->display_options['query']['type'] = 'views_query';
$handler->display->display_options['query']['options']['query_comment'] = FALSE;
$handler->display->display_options['exposed_form']['type'] = 'basic';
$handler->display->display_options['pager']['type'] = 'full';
$handler->display->display_options['pager']['options']['items_per_page'] = '10';
$handler->display->display_options['style_plugin'] = 'default';
$handler->display->display_options['row_plugin'] = 'fields';
/* Field: Aggregator: Item ID */
$handler->display->display_options['fields']['iid']['id'] = 'iid';
$handler->display->display_options['fields']['iid']['table'] = 'aggregator_item';
$handler->display->display_options['fields']['iid']['field'] = 'iid';
/* Sort criterion: Aggregator: Timestamp */
$handler->display->display_options['sorts']['timestamp']['id'] = 'timestamp';
$handler->display->display_options['sorts']['timestamp']['table'] = 'aggregator_item';
$handler->display->display_options['sorts']['timestamp']['field'] = 'timestamp';
$handler->display->display_options['sorts']['timestamp']['order'] = 'DESC';
$handler->display->display_options['sorts']['timestamp']['exposed'] = TRUE;
$handler->display->display_options['sorts']['timestamp']['expose']['label'] = 'Timestamp';

/* Display: Page */
$handler = $view->new_display('page', 'Page', 'page');
$handler->display->display_options['path'] = 'aggregator';

Maybe you could show yours so it's possible to reproduce the bug you reported.

If this is still an issue, please reopen with clear steps to reproduce.