Make The Series Stand By Themselves In Stacked Column Graph

I'm making some reports that are made for getting printed. I currently have three groups of reports, each group having four charts (four A4 papers/group). To cut down on the sheer number of papers on the boards I've been asked to merge these charts so that we'll have all three groups in one chart. This works fine for three of the charts (two line charts and one column chart), where the results gets neatly organized in group order. Where I ran into problems was the last chart..

The last chart is a stacked column chart. With one group, it works quite well; the x-axis is by year/week, and for each week there's a bar where the lower part is "done" and the upper part is "failed".
Now when doing this graph with multiple groups (groups as series), it doesn't put the different groups beside each other as I would've wished, instead it piles them on top of each other as if it was a 100% stacked column.

So the question is; is there some way to make a stacked column graph with multiple series that are one stacked bar per group instead of having all of them stacked on top of each other? Am I just missing some small detail here?