For a project I'm working on I have an area graph that has two series (actual
data and projected data). As the x-axis has weekly data i'd like the point of
the "actual data" to flow right into the "forecasted data". This works but
for some bizarre reason the vertical line that separates these two areas is
not purely vertical but slants backward to the left.

Probably best to show a picture of this. I've posted it he
http://ken.net/images/WonkyAreaGraph.jpg

Any help would be appreciated.