The confirmation and navigation buttons are on the top of anaconda because of nitwits like me, who have a netbook with a 1024 wide x 600 high display, who complained about an earlier anaconda, with the buttons at the bottom where esteemed personages, like you, think they belong. I complained because the buttons were invisible on my lowly system. I remembered what the interface guidelines said about tab order, what says, on linux systems, the 'OK' button is the second to last button, and worked by feel.
You, as an esteemed personage, have never read an interface guideline in your entire life, leaving it to lowly tech drudges as I, who view them as Holy Writ, and actually try to follow them. So uncreative.
You would, under such circumstances, would have unable to install the product, and written a scathing review.