That website is unfortunately a bit of a joke. It's a good idea on the face of it, but it counts every single promise as the same amount of importance, so creating a new learn to camp program for kids counts the same as overhauling the electoral system.
It also counts the electoral system reform promise as kept, based on the verbiage of the promise, which was a promise to look at doing electoral reform. While that may be what was said, that's not what we were all sold, and definitely counts as a broken promise.