diff --git a/wp-admin/includes/ajax-actions.php b/wp-admin/includes/ajax-actions.php
index 7d7d90c759..66863a356b 100644
--- a/wp-admin/includes/ajax-actions.php
+++ b/wp-admin/includes/ajax-actions.php
@@ -2130,16 +2130,6 @@ function wp_ajax_revisions_data() {
 	if ( 0 != $single_revision_id ) {
 		$right_revision = get_post( $single_revision_id );
 
-		//
-		//make sure the left revision is the most recent
-		//
-
-		if ( strtotime( $right_revision->post_modified_gmt ) < strtotime( $left_revision->post_modified_gmt ) ) {
-			$temp = $left_revision;
-			$left_revision = $right_revision;
-			$right_revision = $temp;
-		}
-
 		$linesadded=0;
 		$linesdeleted=0;
 
@@ -2182,14 +2172,6 @@ function wp_ajax_revisions_data() {
 		exit();
 	} //end single model fetch
 
-	//fetch the list of revisions available
-
-	//if we are comparing two revisions, the first 'revision' represented by the leftmost
-	//slider position is the current revision, prepend a comparison to this revision
-	if ( ! wp_first_revision_matches_current_version( $post_id ) ) //revisions don't have current version
-		array_unshift( $revisions, get_post( $post_id ) ) ;
-	//$revisions->append ( get_post( $post_id ) );
-	//error_log( var_dump( $revisions ));
 	$count = -1;
 
 	//reverse the list to start with oldes revision
diff --git a/wp-admin/js/revisions.js b/wp-admin/js/revisions.js
index 4e48ed11f5..6ac4b86e9e 100644
--- a/wp-admin/js/revisions.js
+++ b/wp-admin/js/revisions.js
@@ -465,12 +465,12 @@ window.wp = window.wp || {};
 				// add tooltips to the handles
 				if ( 2 === REVAPP._compareOneOrTwo ) {
 					REVAPP.addTooltip ( $( 'a.ui-slider-handle.left-handle' ),
-						( REVAPP._rightDiff >= REVAPP._revisions.length ) ? '' : REVAPP._revisions.at( REVAPP._leftDiff ).get( 'revision_date_author_short' ) );
+						( REVAPP._leftDiff < 0 ) ? '' : REVAPP._revisions.at( REVAPP._leftDiff - 1 ).get( 'revision_date_author_short' ) );
 					REVAPP.addTooltip ( $( 'a.ui-slider-handle.right-handle' ),
-						( REVAPP._rightDiff >= REVAPP._revisions.length ) ? '' : REVAPP._revisions.at( REVAPP._rightDiff ).get( 'revision_date_author_short' ) );
+						( REVAPP._rightDiff > REVAPP._revisions.length ) ? '' : REVAPP._revisions.at( REVAPP._rightDiff - 1 ).get( 'revision_date_author_short' ) );
 				} else {
 					REVAPP.addTooltip ( $( 'a.ui-slider-handle' ),
-						( REVAPP._rightDiff >= REVAPP._revisions.length ) ? '' : REVAPP._revisions.at( REVAPP._rightDiff ).get( 'revision_date_author_short' ) );
+						( REVAPP._rightDiff > REVAPP._revisions.length ) ? '' : REVAPP._revisions.at( REVAPP._rightDiff - 1 ).get( 'revision_date_author_short' ) );
 				}
 
 				// hide the restore button when on the last sport/current post data