
What sink are you supposed to have?
Your cutout looks like it goes with the AFA Cubeline which is what we have.
And installed, ours looks like this picture on reece's website where the cutout follows the lines of the sink.
http://www.reece.com.au/bathrooms/products/afa/afa-cubeline-double-undermount-kitchen-sink-9500399
Mine is Blanco U2 undermount sink. Do you have the photos of yours in reality?