I am still a novice to grid - in the Assigning Children interactive demo, if you click-and-drag across a row or column, the .child style will always refer to fractions of 1, ⅓, ¼, and ⅕, despite being a 4×4 grid. Can someone confirm whether there's a bug? I'd expect it to rather be 1, ½, ⅓, and ¼.