I had this problem before I installed the plugin.
And my frontPage is not a Page like the others.
This is a Static Front page with the setting Your last post.
The reason is that i want a featered slider on my FrontPage and the Featured Content Options.
If it is possible to create a new page with both these options than it is fine by me (if I know how to do that).
But if it is possible to change the width of the front page bij CSS then it is also fine by me.