Inconsistency with manipulation of dummy data vs db data

code.js

// app.js

routes = require('./routes/routes.js')

app.get('/dummydata', routes.test);

app.get('/transformeddummydata', routes.testTwo);

app.get('/dbdata', routes.testThree);

app.get('/transformeddbdata', routes.testFour);

// Routes file

exports.test = function(req, res){
    returnData(function(err, data){
        res.json(data)
    })
}

exports.testTwo = function(req, res){
    returnData(function(err, data){
         calculatePhotoRanking(data, function(data){
                calculateCountryRankings(data, function(data){
                    res.json(data)
                })     
            })
        })
    }

exports.testThree = function(req, res){
    Photo.find({ country:'RUS', tag: 'cat', isVoted: true}, function(err, data){
        res.json(data)
    })
}

exports.testFour = function(req, res){
    Photo.find({ country:'RUS', tag: 'cat', isVoted: true}, function(err, data){
        calculatePhotoRanking(data, function(data){
            calculateCountryRankings(data, function(data){
                // returned object does not display ranking or countryRanking
                console.log(data[0])
                // however this does return the calculated countryRanking
                console.log(data[0].countryRanking)
                res.json(data)
            })     
        })
    });
};

// Used functions

function calculatePhotoRanking(photos, fn){
    return fn(_.map(photos, function(photo){
        photo.ranking = ((photo.votes /  photo.appearances) * 100).toFixed(0);
        return photo;
    }));
}

function calculateCountryRankings(photos, cb){
    return cb(_.flatten(_.map(countrySorter(photos), averager('ranking'))));
}

function createArraySorter(key) {
    return function (arr) {
        var holder = [];
        _.each(_.uniq(_.pluck(arr, key)), function (e) {
            holder.push(_.where(arr, equalToGiven(key, e)));
        });
        return holder;
    };
}

var countrySorter = createArraySorter('country');

function equalToGiven(key, value) {
    var obj = {};
    obj[key] = value;
    return obj;
}

function averager(key) {
    return function (arr) {
        _.each(arr, function (e) {
            e.countryAverage = _.reduce(_.pluck(arr, key), function (a, b) {
                return a + b / arr.length;
            }, 0);
        });
        return arr;
    };
}

function returnData(cb){
    var data = [{
    __v: 0,
    _id: "5285cbd164ac14f121000012",
    appearances: 1,
    country: "RUS",
    farm: 5,
    id: "4297172189",
    isVoted: true,
    notTag: false,
    secret: "925e90a4d9",
    server: "4058",
    tag: "cat",
    votes: 1,
    dateCreated: "2013-11-15T07:22:57.215Z",
    location: [
      53.1666667,
      48.4666667
    ]
  },
  {
    __v: 0,
    _id: "5285cd7364ac14f12100006a",
    appearances: 5,
    country: "RUS",
    farm: 3,
    id: "5732677537",
    isVoted: true,
    notTag: false,
    secret: "762e059973",
    server: "2714",
    tag: "cat",
    votes: 2,
    dateCreated: "2013-11-15T07:29:55.762Z",
    location: [
      56.1333333,
      47.2333333
    ]
  }]
    return cb(null, data);
}