HighCharts wrong x-axis label

HTML

<script src="https://code.highcharts.com/highcharts.js"></script>

<div id="container" style="height: 400px"></div>

JavaScript

Highcharts.chart('container', {
	"credits": {
		"text": "TEST",
		"href": ""
	},
	"chart": {
		"type": "column"
	},
	"title": {
		"text": ""
	},
	"xAxis": {
		"labels": {
			"format": "{value}%"
		},
		"title": {
			"text": "X-Axis"
		},
		"gridLineWidth": 0
	},
	"yAxis": [{
			"lineWidth": 1,
			"title": {
				"text": "Distribution"
			}
		}
	],
	"plotOptions": {
		"series": {
			"dataLabels": {
				"enabled": true,
				"format": "{point.name}"
			}
		},
		"column": {
			"borderWidth": 0,
			"pointWidth": 5,
			"tooltip": {
				"headerFormat": "<span style=\"color:{point.color}\">{point.x:.2f}%</span><br/>",
				"pointFormat": "<span>Frequency: {point.y}</span>"
			}
		}
	},
	"series": [{
			"name": "M1",
			"type": "column",
			"color": "#5187B980",
			"data": [[-17.8, 1], [-17.6, 0], [-17.4, 0], [-17.2, 0], [-17, 0], [-16.8, 0], [-16.6, 0], [-16.4, 0], [-16.2, 0], [-16, 0], [-15.8, 0], [-15.6, 0], [-15.4, 0], [-15.2, 0], [-15, 0], [-14.8, 0], [-14.6, 0], [-14.4, 0], [-14.2, 0], [-14, 0], [-13.8, 0], [-13.6, 0], [-13.4, 0], [-13.2, 0], [-13, 0], [-12.8, 0], [-12.6, 0], [-12.4, 0], [-12.2, 0], [-12, 0], [-11.8, 1], [-11.6, 0], [-11.4, 0], [-11.2, 0], [-11, 1], [-10.8, 0], [-10.6, 0], [-10.4, 0], [-10.2, 0], [-10, 1], [-9.8, 0], [-9.6, 0], [-9.4, 0], [-9.2, 1], [-9, 0], [-8.8, 0], [-8.6, 0], [-8.4, 0], [-8.2, 0], [-8, 1], [-7.8, 1], [-7.6, 0], [-7.4, 1], [-7.2, 2], [-7, 2], [-6.8, 0], [-6.6, 0], [-6.4, 0], [-6.2, 0], [-6, 3], [-5.8, 3], [-5.6, 1], [-5.4, 0], [-5.2, 0], [-5, 0], [-4.8, 0], [-4.6, 0], [-4.4, 0], [-4.2, 1], [-4, 0], [-3.8, 0], [-3.6, 1], [-3.4, 3], [-3.2, 3], [-3, 1], [-2.8, 4], [-2.6, 2], [-2.4, 0], [-2.2, 1], [-2, 6], [-1.8, 5], [-1.6, 2], [-1.4, 1], [-1.2, 0], [-1, 1], [-0.8, 5], [-0.6, 3], [-0.4, 4], [-0.2, 4], [0, 5], [0.2, 4], [0.4, 3], [0.6, 4], [0.8, 3], [1, 6], [1.2, 4], [1.4, 9], [1.6, 6], [1.8, 6], [2, 4], [2.2, 5], [2.4, 1], [2.6, 6], [2.8, 4], [3, 2], [3.2, 6], [3.4, 3], [3.6, 2], [3.8, 6], [4, 3], [4.2, 4], [4.4, 4], [4.6, 0], [4.8,...