Stacked bar with negative value can float in the air according to series order

[eternel7]

In a stacked bar chart if the first series is negative the second one start at the absolute value of the first.

Here is a jsbin example :
http://jsbin.com/rapasomeyi/1/edit?html,js,output

The Morris js code is :
Morris.Bar({
element: 'bar-example1',
data: [
{ y: '2006', a: -100, b: 90 },
{ y: '2007', a: -75, b: 65 },
{ y: '2008', a: -50, b: 40 },
{ y: '2009', a: -75, b: 65 },
{ y: '2010', a: -50, b: 40 },
{ y: '2011', a: 75, b: 65 },
{ y: '2012', a: 100, b: 90 }
],
xkey: 'y',
ykeys: ['a', 'b'],
labels: ['Series A0', 'Series B0'],
stacked: true
});
Morris.Bar({
element: 'bar-example2',
data: [
{ y: '2006', a: 100, b: -90 },
{ y: '2007', a: 75, b: -55 },
{ y: '2008', a: 50, b: -45 },
{ y: '2009', a: 75, b: -6 },
{ y: '2010', a: 50, b: -20 },
{ y: '2011', a: 75, b: -95 },
{ y: '2012', a: 10, b: -90 }
],
xkey: 'y',
ykeys: ['a', 'b'],
labels: ['Series A1', 'Series B1'],
stacked: true
});

[eternel7]

Find #533 that seems to be a solution.