In books, it is traditional for long tables in landscape mode to repeat their
headers only on the verso (left-hand) pages and not on the right-hand (recto)
pages. Word (all versions) only allows headers to repeat on every page -- so,
if one is laying out book pages, one has to physically cut out (or white out)
the undesired header rows, leaving the recto pages noticeably shorter than
the verso.