Stacked Area Chart has one series draw out of proportion.

[blogcraft]

Description

I have a Stacked Area Chart with n Series. But for some reason some series just go nuts when drawn in screen.

Steps to Reproduce

1. Create a Stacked Area chart
2. Add 3 series with data
3. show them together

Expected Behavior

Chart should visually represent the data

Actual Behavior

Chart don't represent the data.

Screenshots

Just C Series (looks good):

A + B Series (still ok).

But add B + C (and C gets mad!)

All Combined:

Reproduction Link

https://jsfiddle.net/jysntgfr/