Donut with Offset Center

[cspmosh]

When using the donut style chart with only 1 series greater than 0 and with the startAngle option set to certain values, the center of the donut (the "hole" if you will) is off center. I found that for our startAngle value of 150 or 120 this was the case. I was able to resolve this by changing the startAngle to 0 or 180. Not sure why certain values made this happen.