tedster - 8:05 pm on Jun 1, 2007 (gmt 0)

the index page maybe #5 for one keyword phrase and #25 for a subpage.

That sounds normal to me. There is a filter that limits a domain to 2 results in any search, but 2 results is pretty common. If they end up on nthe same page of a SERP, that's were you get the indented listings -- the filter clusters the two pages into two adjacent rankings. So if you can raise the #25 to #10, it would immediately pop to #6, indented just under your #5 ranked url.