Liar, Liar, Swatch on Fire!

Who stole my gauge?

I swatched for this. Honest, I did.

The final measurements of the finished shawl were close to the pattern. Honest, they were.

Granada Shawl designed by Kathy Merrick

So, Sherlock, how come I ended up using 3 balls of Kidsilk Haze instead of 2?