Существуют ли подобные ограничения ?

                    $db->query( "UPDATE " . PREFIX . "_post SET title='$title', date='$thistime', short_story='$short_story', full_story='$full_story', xfields='$filecontents', descr='{$metatags['description']}', keywords='{$metatags['keywords']}', category='$category_list', alt_name='$alt_name', allow_comm='$allow_comm', approve='$approve', allow_main='$allow_main', allow_mail='$allow_mail', fixed='$news_fixed', allow_br='$allow_br', symbol='$catalog_url', tags='{$_POST['tags']}', metatitle='{$metatags['title']}' WHERE id='$item_db[0]'" );

                    if( $member_id['user_group'] == 3 ) { // 3 <-- ID группы
                        $db->query( "UPDATE " . PREFIX . "_post SET short_story='$short_story' WHERE id='$item_db[0]'" );
                    } else {
                        $db->query( "UPDATE " . PREFIX . "_post SET title='$title', date='$thistime', short_story='$short_story', full_story='$full_story', xfields='$filecontents', descr='{$metatags['description']}', keywords='{$metatags['keywords']}', category='$category_list', alt_name='$alt_name', allow_comm='$allow_comm', approve='$approve', allow_main='$allow_main', allow_mail='$allow_mail', fixed='$news_fixed', allow_br='$allow_br', symbol='$catalog_url', tags='{$_POST['tags']}', metatitle='{$metatags['title']}' WHERE id='$item_db[0]'" );
                    }

                    $db->query( "UPDATE " . PREFIX . "_post SET title='$title', short_story='$short_story', full_story='$full_story', xfields='$filecontents', descr='{$metatags['description']}', keywords='{$metatags['keywords']}', category='$category_list', alt_name='$alt_name', allow_comm='$allow_comm', approve='$approve', allow_main='$allow_main', allow_mail='$allow_mail', fixed='$news_fixed', allow_br='$allow_br', symbol='$catalog_url', tags='{$_POST['tags']}', metatitle='{$metatags['title']}' WHERE id='$item_db[0]'" );

                    if( $member_id['user_group'] == 3 ) { // 3 <-- ID группы
                        $db->query( "UPDATE " . PREFIX . "_post SET short_story='$short_story' WHERE id='$item_db[0]'" );
                    } else {
                        $db->query( "UPDATE " . PREFIX . "_post SET title='$title', short_story='$short_story', full_story='$full_story', xfields='$filecontents', descr='{$metatags['description']}', keywords='{$metatags['keywords']}', category='$category_list', alt_name='$alt_name', allow_comm='$allow_comm', approve='$approve', allow_main='$allow_main', allow_mail='$allow_mail', fixed='$news_fixed', allow_br='$allow_br', symbol='$catalog_url', tags='{$_POST['tags']}', metatitle='{$metatags['title']}' WHERE id='$item_db[0]'" );
                    }

                if( $item_db[6] ) $db->query( "UPDATE " . PREFIX . "_post_extras SET allow_rate='$allow_rating', votes='$add_vote', disable_index='$disable_index', access='$group_regel', editdate='$added_time', editor='{$member_id['name']}', reason='$editreason', view_edit='$view_edit' WHERE news_id='$item_db[0]'" );
                else $db->query( "INSERT INTO " . PREFIX . "_post_extras (news_id, allow_rate, votes, disable_index, access, editdate, editor, reason, view_edit) VALUES('{$item_db[0]}', '{$allow_rating}', '{$add_vote}', '{$disable_index}', '{$group_regel}', '{$added_time}', '{$member_id['name']}', '{$editreason}', '{$view_edit}')" );

                if( $item_db[6] ) {
                    if( $member_id['user_group'] == 3 ) { // 3 <-- ID группы
                        $db->query( "UPDATE " . PREFIX . "_post_extras SET editdate='$added_time', editor='{$member_id['name']}' WHERE news_id='$item_db[0]'" );
                    } else {
                        $db->query( "UPDATE " . PREFIX . "_post_extras SET allow_rate='$allow_rating', votes='$add_vote', disable_index='$disable_index', access='$group_regel', editdate='$added_time', editor='{$member_id['name']}', reason='$editreason', view_edit='$view_edit' WHERE news_id='$item_db[0]'" );
                    }
                } else {
                    $db->query( "INSERT INTO " . PREFIX . "_post_extras (news_id, allow_rate, votes, disable_index, access, editdate, editor, reason, view_edit) VALUES('{$item_db[0]}', '{$allow_rating}', '{$add_vote}', '{$disable_index}', '{$group_regel}', '{$added_time}', '{$member_id['name']}', '{$editreason}', '{$view_edit}')" );
                }