After penguin update why google changed the search results?

i can see now, after penguin update, google changed the search results, first i am seeing google listing then google organic results.

will this going to be permanent, then every seo company going to affect, bcoz we gonna get less number of visitors.

There are still the same number of sites being shown, there are still the same number of people using Google. If your site is moved down the rankings then someone else’s site is moving up – which probably means that Google thinks their site is better than yours. You need to give Google good reasons to think that your site is better.