Index: wp-includes/post-template.php
===================================================================
--- wp-includes/post-template.php	(revision 23933)
+++ wp-includes/post-template.php	(working copy)
@@ -1423,11 +1423,9 @@
 	$titlef = _x( '%1$s', 'post revision' );
 
 	// Since 3.6 revisions include a copy of the current post data as a revision.
-	// The following removes that revision when $parent == false
+	// The following adds that revision when $parent == true
 	$parent_included = _wp_get_post_revision_version( reset( $revisions ) ) > 0;
-	if ( $parent_included && ! $parent )
-		array_shift( $revisions );
-	elseif ( ! $parent_included && $parent )
+	if ( ! $parent_included && $parent )
 		array_unshift( $revisions, $post );
 
 	$rows = $right_checked = '';
Index: wp-admin/includes/ajax-actions.php
===================================================================
--- wp-admin/includes/ajax-actions.php	(revision 23933)
+++ wp-admin/includes/ajax-actions.php	(working copy)
@@ -2129,7 +2129,7 @@
 			$left_revision = get_post( $post_id );
 
 		// make sure the right revision is the most recent
-		if ( $compare_two_mode && $right_revision->ID < $left_revision->ID ) {
+		if ( $compare_two_mode && $right_revision->post_date < $left_revision->post_date ) {
 			$temp = $left_revision;
 			$left_revision = $right_revision;
 			$right_revision = $temp;