Possible Bug in d3.scaling | EDIT: How to void grouping/categorizing data

anzahlKostenstellen is a PrimitiveValue but is used always as a <number>anzahlKostenstellen 

I figured out what the problem was but still couldnt solve it.

In my table are two identical names.

For example if this is my original Table:

verantwortlicher    gesamtKosten    anzahlKostenstellen

Peter                         200                              3

Peter                         500                              5

Martin                      100                              1

Tom                           400                              9

It categorizes them together, which makes sense because my verantwortlicher is set to "Grouping" in my capabilities,json:

verantwortlicher    gesamtKosten    anzahlKostenstellen

Peter                         200                              3

Peter                          500                              5

Martin                      100                              1

Tom                           400                              9

But i dont want PBI to group it together. How can i do this?

My capabilities.json

{
    "dataRoles": [		
		{
            "displayName": "Verantwortlicher",
            "name": "verantwortlicher",
            "kind": "Grouping" // If i change this to "Measure", nothing works...
        },
		{
            "displayName": "Gesamtkosten",
            "name": "gesamtKosten",
            "kind": "Measure"
        },
        {
            "displayName": "Anzahl Kostenstellen",
            "name": "anzahlKostenstellen",
            "kind": "Measure"
        }
    ],
    "dataViewMappings": [
        {
      "table": {
        "rows": {
          "select": [
            { "for": { "in": "verantwortlicher" } },
            { "for": { "in": "gesamtKosten" } },
            { "for": { "in": "anzahlKostenstellen" } }
          ]
        }
      }
        }
    ],

...

My Interface:

    interface ChartDataPoint {
		
	verantwortlicher: string; 
	gesamtKosten: PrimitiveValue; 
        anzahlKostenstellen: PrimitiveValue; 
        color: string; 
        selectionId: ISelectionId; 
		
    };

My visualTransform:

function visualTransform(options: VisualUpdateOptions, host: IVisualHost): ChartViewModel {

       let dataViews = options.dataViews;
       let rows = dataViews[0].table.rows;

       let chartDataPoints: ChartDataPoint[] = [];

       for (let i = 0, len = rows.length; i < len; i++) {

            var row = rows[i];

            chartDataPoints.push({
				
                verantwortlicher: row[0] + '',
                gesamtKosten: <number>row[1],
		anzahlKostenstellen: <number>row[2],
                color: null,
                selectionId: null
					
            });
			
        }

        return {

        dataPoints: chartDataPoints

        };

}

Thank you in advance!