You'll have to edit the news page itself in the Advanced Layout Options. You'll see a command <!--News:StartNewsSection:5--> Simply change it to <!--News:StartNewsSection:10--> and you're good to go.
Head to Admin > General Settings > News, and choose a the new layout from the drop down list. Clicking [Go Live] in this context only enables it so that it can be chosen to be used, but it does not make it the currently selected layout (it's the same thing with the forum layouts).
Ok, I made BiggerNews in the Advanced Layout section and the News Admin is showing it is using what is in that file. But it does not appear to be working. Can you take a look and let me know what's wrong, please? followers.dkpsystem.com
EDIT: It was selected in News Admin.. I selected one of the other default settings and then changed it back and it took effect.
Originally, I made BiggerNews and left it blank. I never changed the setting to use it in News Admin -- it must have done it automatically. Then when I updated BiggerNews, it didn't apply the changes until I switched it to something else and then changed it back again.