Rendered color matrix supplied in data doesn't match up with colorchecker colors

[y2k0999]

How is the rendered color matrix generated? I noticed that the color values in the matrix don't seem to match up with the macbeth color checker. I can see that the last color is black, but other colors don't seem to match up (there is no white). How can I make my own?

On the left is the provided matrix and on the right is the matrix I generated.