Created attachment 623 [details]
Side by side

For each Bar series we are using a special custom VertAxis so TCustomBarSeries.DoBeforeDrawChart calculates always INumBars=1 
We want to group all series with the same StartinPosition of their mandatory axis (see attachement)

I suggest to change the function SameMandatoryAxis in Procedure TCustomBarSeries.DoBeforeDrawChart as

// Returns True when both Self and ASeries mandatory axis is "the same".
  function SameMandatoryAxis(const ASeries:TChartSeries):Boolean;
  begin
    if YMandatory then
       result:=((VertAxis<>aCustomVertAxis) and      
                (ASeries.VertAxis<>aCustomVertAxis))
                //BK 28.07.2016 or (ASeries.GetVertAxis=GetVertAxis)
                or (ASeries.GetVertAxis.StartPosition=GetVertAxis.StartPosition)
    else
       result:=((HorizAxis<>aCustomHorizAxis) and 
                (ASeries.HorizAxis<>aCustomHorizAxis))
                //BK 28.07.2016 or (ASeries.GetHorizAxis=GetHorizAxis);
               or (ASeries.GetHorizAxis.StartPosition=GetHorizAxis.StartPosition);
  end;