There is solution, just add ORDER BY post_date_gmt desc to mysql queries:
120 $blog_list = get_blog_list( 0, 'all' );
121 if (($white == 0 && !in_array(1, $wgt_miss)) || ($white == 1 && in_array(1, $wgt_white))) {
122 $sqlstr = "(SELECT 1 as blog_id, id, post_date_gmt from ".$table_prefix ."posts where post_status = 'publish' and post_type = 'post' and post_title <> '".__('Hello world!')."' ORDER BY post_date_gmt desc ".$limitstr.")";
123 }
124 $uni = '';
125
126 foreach ($blog_list AS $blog) {
127 if (($white == 0 && !in_array($blog['blog_id'], $wgt_miss) && $blog['blog_id'] != 1) ||
128 ($white == 1 && $blog['blog_id'] != 1 && in_array($blog['blog_id'], $wgt_white))) {
129 if ($sqlstr != '')
130 $uni = ' union ';;
131 $sqlstr .= $uni . " (SELECT ".$blog['blog_id']." as blog_id, id, post_date_gmt from ".$table_prefix .$blog['blog_id']."_posts where post_status = 'publish' and post_type = 'post' and post_title <> '".__('Hello world!')."' ORDER BY post_date_gmt desc ".$limitstr.")";
132 }
133 }
