您可以使用pointPlacement属性来定位列：

series: [{
  ...,
  pointPlacement: 0.12
},
{
  ...,
  pointPlacement: -0.12
}]

示例：http://jsfiddle.net/BlackLabel/2e3rawgu/

但是如果你的图表有动态宽度，你需要通过自定义代码设置位置，例如：

chart: {
    ...,
    events: {
      render: function() {
        const xAxis = this.xAxis[0],
          series = this.series,
          plotLeft = this.plotLeft;

        const correctPosition = (points, correction) => {
          points.forEach(point => {
            point.graphic.attr({
              x: xAxis.toPixels(point.x) - plotLeft + correction
            });
          });
        }

        correctPosition(series[0].points, -POINT_WIDTH);
        correctPosition(series[1].points, 0);
      }
    }
  }

现场演示：http://jsfiddle.net/BlackLabel/ae2htc0z/
API引用：https://api.highcharts.com/highcharts/series.column.pointPlacement