Please put your version of Finale and your operating system info in your profile by pulling down your name in the gray area at the top of the page. It's hard to help without knowing what program you are using.

Thanks for attention. I am first timer here and I use now just a free version of Finale Notepad (it works for me) with Windows 10. I understand that is supposed to be limited, but not to the level of issue I encountered. Once again, after choosing voice, piano, guitar I got two blocks of staves (two staves) on each pages, which are suddenly got moved vertically on ends of a sheet forming a huge blank space between them. At the beginning empty space was below second stave on each sheet. Something elementary that I do not see now.