Because when I’m learning a new vocab, I (and a lot of us) try to guess which reading the word uses before checking. This also implies guessing correctly which kanji is used. By having the kanji appear in the same order in the Kanji Breakdown as it appears on the vocab, it makes our visual contact easier when we’re checking our guesses.
I don’t remember seeing any such script, and I trust Jsprspereira did a decent enough search, so I went ahead and put something together. Haven’t done extensive testing yet, but it seems to work.
I have to say it’s so much nicer having them in order, I should have done this a long time ago.