PenciDesign replied
Hi,
1/ That CDN option just use to load minify CSS/JS files from the Penci Speed Optimizer plugin.
When you using the plugin Penci Speed Optimizer, we will merge all CSS files to one CSS file and all JS files to one JS file. The CDN option there uses to load the merge CSS & JS files.
2/ As I checked, it already appears. It delays loading, so you can't see it on the view source.
3/ When you use Penci Speed Optimizer plugin, we will optimize for the first load screen, so you don't need to do anything there.
4 & 5/ It seems that come from a plugin you're using because we don't render this code. Let's check with other plugins you're using. Let's deactivate all caching plugin and check again with each plugin you're using to get the correct results.
Remember clear the merge files via Dashboard > Settings > PageSpeed Optimizer for each time deactivate/activate a plugin to get the correct results.
Best Regards,
PenciDesign