Tribal Wars building duration calculation

tw-simulator.js

/*
 * Installation: Save as snippet in Chrome DevTools. (Crtl + Shift + i, Tab 'Sources', Sub-Tab 'Snippets', right-click, 'New')
 *
 * Usage:
 * 1) Go to http://<your-world>.die-staemme.de/interface.php?func=get_building_info
 * 2) Adjust the 'currentMain' and 'jobs' to match your main building at start and the build jobs you want to simulate.
 * 3) Run snippet.
 */
(function() {
  'use strict';
  
  // what stage is your main building currently?
  var currentMain = 10;
  // what do you want to build?
  var jobs = [
    ['main', 11, 12, 13, 14, 15, 16, 17, 18, 19, 20],
    ['smith', /*5, 6, 7,*/ 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
  ];


  // ---- No changes required beyond this line

  var forEach = Array.prototype.forEach,
      reduce = Array.prototype.reduce,
      slice = Array.prototype.slice;
    
  var config = document.querySelector('config');
  var buildings = {};
  forEach.call(config.children, function(building) {
    buildings[building.tagName] = reduce.call(building.children, function(memo, child) {
      memo[child.tagName] = parseFloat(child.textContent);
      return memo;
    }, {});
  });
    
  var calc = function(hg, level, buildTime, buildTimeFactor, wood, woodFactor, stone, stoneFactor, iron, ironFactor) {
    // http://forum.tribalwars.us/showthread.php?389-guide-Building-Formulas
    var exponent = Math.max(-13, (level - 1 - 14 / (level-1)));
    var baseTime = buildTime * 1.18 * Math.pow(buildTimeFactor, exponent);
    var time = baseTime * Math.pow(1.05, -hg);
    return [Math.round(time), Math.round(wood * Math.pow(woodFactor, level - 1)), Math.round(stone * Math.pow(stoneFactor, level - 1)), Math.round(iron * Math.pow(ironFactor, level - 1))];
  };
    
  var queue = [];
    
  var queueJobs = function(buildingName) {
    var building = buildings[buildingName];
    var stages = slice.call(arguments, 1);
    stages.forEach(function(stage) {
     queue.push([buildingName, stage].concat(calc(currentMain, stage, building.build_time, building.build_time_factor, building.wood, building.wood_factor, building.stone, building.stone_factor, building.iron, building.iron_factor)));
     if(buildingName === 'main') {
       currentMain = stage;
     } 
    });
  };
    
  jobs.forEach(function(job) {
    queueJobs.apply(this, job);
  });

  var add = function(index) {
    return function(a, b) {
      return a + b[index];
    };
  };

  var pad = function(value) {
    value = parseInt(value, 10);
    return value < 10 ? '0' + value : '' + value;
  }

  var formatTime = function(seconds) {
    var hours = Math.floor(seconds / 3600);
    var minutes = Math.floor((seconds % 3600) / 60);
    var seconds = seconds % 60;
    return pad(hours) + ':' + pad(minutes) + ':' + pad(seconds);
  }
    
  console.table(queue.map(function(row) {
    row = row.slice(0);
    var seconds = Math.round(row[2]);
    row[2] = formatTime(seconds);
    return row;
  }));

  var totalSeconds = queue.reduce(add(2), 0);
  var totalWood = queue.reduce(add(3), 0);
  var totalStone = queue.reduce(add(4), 0);
  var totalIron = queue.reduce(add(5), 0);

  console.log('Total', formatTime(totalSeconds), totalWood, totalStone, totalIron);
  var totalHours = totalSeconds / 3600;
  console.log('Avg per hour', Math.round(totalWood / totalHours), Math.round(totalStone / totalHours), Math.round(totalIron / totalHours));
  return '... done!';
})();

and calculate of the population?

when I run it on a polish server it calculates the wrong time, any idea what could be wrong?