Recently I came across problem with syndication page URL. This is what I've done.
1. Installed FeedWordpress Plugin.
2. Created a custom post type called 'News'
3. Set the permalink to /%postname%/
4. Assigned custom post type to 'News' on Post and Links Settings.
The style and content for content div is applying from parent theme - twentyeleven. I'm also getting a sidebar from parent theme. Entire CSS for the content is not applying from child themes. I can see header and footer with style applied but not the syndication area.
The style is applying when I change my permalink to ?p=123
See the URL.