Ok, so I used your settings on Platform Pro and it does indeed display a full width post with full content and the clips display only the excerpt. However, I am not sure if this is actually a bug in Platform Pro, that has been fixed in PageLines Framework, as in the settings you can either use excerpts or the full content, there is noway to control this on individual posts.
The only way for you to have this functionality is to either custom code in the form of a hook/custom section or enable both excerpts and full content on both the Blog Page. However, doing the latter, will result in double content, you will need to use custom CSS, to hide the excerpts on the Full Width post, so it only displays the full content and vice versa on the Clips, so it only displays the excepts and not the full content.
Although the above method will work, I would really recommend it, as you're loading content that isn't even going to be used or read, but will still be visible in your page source code. If you choose to use custom CSS, to do the above, I recommend you read our custom CSS documentation for assistance, as we are unable to provide the code to achieve this kind of layout.
So I would recommend creating your unique section or use custom code via a hook. If you're unsure how to achieve this, I would recommend contacting one of our Pros, who will be happy to assist you.