Showing different numbers of albums in Main page and after category is open.

[netlovers]

I have lots of categories and sub-categories in my site so i donot want to display lots of albums from every category in main page because it increases length of page alot so i have set to show only 2 albums from every categories and its ok for main page but the problem is that when i open any category it is also showing 2 albums and showing lots of pages for more albums like 1 2 3 4 5 6  and so on  i wanna display 10 albums when the category is open and only 2 albums on main page from every category.
Is there any way to do this.