Paper dimensions, paper size incorrect in writer

I have a problem with Open Office writer portable. When the program opens, the paper dimensions are not accurate. I have tried to change the page dimensions to "letter" and "portrait" settings but the dimensions still do not change. The paper will not fit correctly on the screen and goes off the screen, is not centered properly, and dimensions are not "8 1/2" x "11" Actual dimensions are about "7 and 10"

Also, the font size is not accurate to the currently listed size and is much larger than stated in the menu.