I would suggest a quick and dirty method to avoid the Index feature in Writer. Simply use a "leader" to fill the space between the text and the page number. Here is an example using a series of periods as the leader character. Note: adjust the number to suit your needs.
Title of Section ................... Page
Chapter 1 ............................ 1
Chapter 2 ............................ 2
Chapter 3 ............................ 3
Title of Section ................... Page
Chapter 1 ............................ 4
Chapter 2 ............................ 5
Chapter 3 ............................ 6
For more information check out the following site.
http://desktoppub.about.com/od/typelayout/ss/leaders.htm