Skip, absolutely nothing to do with the Content Installer - do read the background for what it is for.

A first step to fix your viewing is in the browser, press Ctrl+F5 - this purges the local cache of the changes JS & CSS files causing the funny presentation.
This happens when you publish repeatedly.

If it is still happening, it may be caching on your server.
To prove that publish to a sub-folder under your present site.

Pass back a link to your site if you are still having issues.

Acorn