Fix adding to ways in the reverse direction

js/id/actions/add_way_node.js

@@ -4,7 +4,7 @@ iD.actions.AddWayNode = function(wayId, nodeId, index) {
         var way = graph.entity(wayId),
             node = graph.entity(nodeId),
             nodes = way.nodes.slice();
-        nodes.splice(index || nodes.length, 0, nodeId);
+        nodes.splice((index === undefined) ? nodes.length : index, 0, nodeId);
         return graph.replace(way.update({nodes: nodes}));
     };
 };

js/id/modes/add_road.js

@@ -8,6 +8,7 @@ iD.modes.AddRoad = function() {
 
     mode.enter = function() {
         var map = mode.map,
+            node,
             history = mode.history,
             controller = mode.controller;
 
@@ -37,7 +38,7 @@ iD.modes.AddRoad = function() {
 
             } else if (datum.type === 'way') {
                 // begin a new way starting from an existing way
-                var node = iD.Node({loc: map.mouseCoordinates()}),
+                node = iD.Node({loc: map.mouseCoordinates()}),
                     index = iD.util.geo.chooseIndex(datum, d3.mouse(map.surface.node()), map);
 
                 history.perform(
@@ -48,7 +49,7 @@ iD.modes.AddRoad = function() {
 
             } else {
                 // begin a new way
-                var node = iD.Node({loc: map.mouseCoordinates()});
+                node = iD.Node({loc: map.mouseCoordinates()});
 
                 history.perform(
                     iD.actions.AddWay(way),

js/id/modes/draw_road.js

@@ -9,7 +9,7 @@ iD.modes.DrawRoad = function(wayId, direction) {
             controller = mode.controller,
             way = history.graph().entity(wayId),
             node = iD.Node({loc: map.mouseCoordinates()}),
-            index = (direction === 'forward') ? undefined : -1,
+            index = (direction === 'forward') ? undefined : 0,
             headId = (direction === 'forward') ? _.last(way.nodes) : _.first(way.nodes),
             tailId = (direction === 'forward') ? _.first(way.nodes) : _.last(way.nodes);