I have built a 100% stacked chart based on 4 yearly series.
My problem is the series are not displayed in the same order in every stack.
In one of the stacks, one data point jumps up from the bottom to the center,
like so:
a a a
b d b
c b c
d c d
2001 2002 2003
(d jumps up in year 2002)

I would like the series to be aligned and so to appear in the same order in
every stack.
Tweaking the series order setting only serves to displace the problem.
Thanks for any suggestion.