Thanks for your reply! I tried everything you suggested, but unfortunately I could not make it work. I can fix those pages(4 and 6) with your instruction, but later other pages have same problem in this and in other chapters. Word won't let me "force" those lines there, or is there way to do that?

I would just like to have "even lines" in top and bottom, like in commercial books. Of course I still have to change fonts, book size etc. later, but I would like to know how to make lining look as in other books. Any further info would be highly appreciated.