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.
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