I'll get to the link later but I don't understand. I am writing a formal
paper and the pages end up having varied bottom margins between text and
footnote separator. Some are as much as a two inches and others come almost
down to the separator. This is not acceptable on a formal paper.
That might happen if you have a lot of footnotes -- especially, more
than one reference on a single line -- and Word has to move the line
with the footnote reference in it to the top of the next page so that
every footnote starts on the same page where its reference is.
Do you by any chance have "Keep lines together" checked in your
Footnote Text paragraph style, so that Word can't break footnotes