[Plugin: WP125] minimalist and random

I’m trying to figure out how to set up the ad section so that I can only have 2 columns of 4 rows and have all of the ads randomly show up. I can’t figure out how to do this, as the ads will only run if they are numbered to 8 (the ones from 9-+ aren’t showing up)

can someone explain to me how to do this?

http://ww.wp.xz.cn/extend/plugins/wp125/