Exporting highstock chart data shows data discrepancies - angularjs

I am trying to export highstock data to csv/xlsx and also view data table. But I do not get proper data when I download or view data. It exports the chart series data as well as the navigator series data.
Highcharts.stockChart('container_' + $scope.tileId, {
rangeSelector: {
selected: 1,
allButtonsEnabled: true,
inputEnabled: true,
buttons: [{
type: 'minute',
count: 60,
text: '1h'
}, {
type: 'day',
count: 1,
text: '1d'
}, {
type: 'week',
count: 1,
text: '1w'
}, {
type: 'month',
count: 1,
text: '1m'
}, {
type: 'year',
count: 1,
text: '1y'
}, {
type: 'all',
text: 'All'
}]
},
chart: {
width: null,
marginRight: 100
},
title: {
text: $scope.tileName
},
navigator: {
enabled: true
},
exporting: {
chartOptions: {
rangeSelector: {
enabled: false
}
},},
yAxis: {
title: { text: $scope.xAxisLabel }
},
plotOptions: {
},
xAxis: {
type: 'datetime'
},
legend: {
enabled: true,
align: 'center',
verticalAlign: 'bottom',
layout: 'horizontal',
},
series: $scope.seriesOptions
});
I am also using export-data.js as Highstock does not support export to excel directly.
data downloaded looks something like this
Now If I disable the navigator the exported data is correct.
The issue is I need to keep the Navigator enabled and not export the series data in the navigator but only the Chart series data.

According to this:
To prevent the navigator in a stock chart, set
navigator.series.includeInCSVExport to false.
Like this:
navigator: {
series: {
includeInCSVExport: false
}
}

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UPDATE
If I add a minimum to y-axis I get closer (sort of)
...
axes: [{
type: 'Numeric',
position: 'left',
fields: ['CPI_P', 'CPI_C'],
title: 'CPI',
grid: true,
minimum: 1,
}....
It's the right idea, because the bars now are relevant to the number 1, but I obviously need to keep the bars on the graph.
What has seemed to work is subtracting 1 from my data and adding 1 to the labels.
axes: [{
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fields: ['PeriodAmount', 'CumulativeAmount'],
label:{
renderer:function(v){
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}
}...]
This is a viable work around for me, but I wouldn't consider this an elegant answer since it isn't very configurable for custom values. For example, changing this to -1 or 2 would require more work than just changing a simple setting.

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