parse duplicate save bug sample code

.js

Parse.Cloud.define("testSave", function(request, response) {
    var id = request.params.class1Id;
    var query = new Parse.Query('Class1');
    query.include('Class2Pointer');
    query.get(id).then(function (Class1) {
        var Class2 = Class1.get('Class2Pointer');
        Class2.set('text', 'snoopy');
        // test 1: this will have duplicate save two times
        Class2.set('Class1Pointer', Class1);
        // test 2: this will save once
        /*
        var CLASS1 =  Parse.Object.extend("Class1");
        var class1Pointer = CLASS1.createWithoutData(Class1.id);
        Class2.set('Class1Pointer', class1Pointer);
        */
        // test 3: this will save once
        /*
        var class1Pointer = new Parse.Object("Class1");
        class1Pointer.id = Class1.id;
        Class2.set('Class1Pointer', class1Pointer);
        */
        return Class2.save();
    }).then(function (Class2) {
        return response.success();
    }, function (error) {
        return response.error();
    });
});

Parse.Cloud.beforeSave("Class1", function(request, response) {
    console.log("====>Class1 saved!");
    return response.success();
});

Parse.Cloud.beforeSave("Class2", function(request, response) {
    console.log("====>Class2 saved!");
    return response.success();
});

related issue:
https://groups.google.com/forum/?utm_source=digest&utm_medium=email#!topic/parse-developers/IJI4UMkxTg8