Json 对面的行列进行排序时可能出现错误

我有一张既有行又有列的刻面图.我想按最大值从左到右和从上到下对行和列进行排序(左上角是最大的).当我们的每一行和每一列都有数据时，这种方法工作得很好，但是如果缺少一些数据，那么这些值就会被推到错误的行或列中，如您在下面看到的.

这是个窃听器吗？

我设法通过用一个JavaScript函数推入假值来解决这个问题，但我只是想判断一下这里出了什么问题.将鼠标悬停在每个方框上，你会看到日本现在已经进入了欧洲.

{
  "data": {"url": "data/cars.json"},
  "mark": "bar",
  "transform": [
    {
      "filter": "datum.Origin === 'Japan' || datum.Origin === 'Europe'"
    },
    {
      "filter": "datum.Horsepower >= 110"
    },
    {
      "joinaggregate": [{"op": "count", "field": "Name", "as": "CountOrigin"}],
      "groupby": ["Origin"]
    },
    {
      "calculate": "slice('000000' + format(datum.CountOrigin, '.0f'), -6) + '-' + datum.Origin",
      "as": "OriginSort"
    },
    {
      "joinaggregate": [
        {"op": "count", "field": "Name", "as": "CountCylinders"}
      ],
      "groupby": ["Cylinders"]
    },
    {
      "calculate": "slice('000000' + format(datum.CountCylinders, '.0f'), -6) + '-' + format(datum.Cylinders, '.0f')",
      "as": "CylindersSort"
    }
  ],
  "encoding": {
    "y": {"aggregate": "count", "field": "Name", "type": "quantitative"},
    "row": {
      "field": "Origin",
      "type": "nominal",
      "sort": {"field": "OriginSort", "order": "descending"}
    },
    "column": {
      "field": "Cylinders",
      "type": "quantitative",
      "sort": {"field": "CylindersSort", "order": "descending"}
    },
    "tooltip": [
      {"field": "Name"},
      {"field": "Origin"},
      {"field": "OriginSort"},
      {"field": "CylindersSort"}
    ],
    "color": {"field": "Horsepower", "type": "ordinal"}
  }
}