I know the correct format for a novel is to begin Chapter One two-thirds down the page. Once, I read that other chapters should begin 1/3 down the page. This looks really weird to me, like I made a mistake in spacing. Do editors expect or desire to see manuscripts with successive chapters spaced 1/3 down the page?
Don’t sweat this detail. Editors don’t care about that. If they get past Chapter One when reading your submission, they’re far more interested in what you’re doing within the story than with the spacing above the chapter headers. The difference is so minor, just choose the one that feels most pleasing to your eyes.