My Featured slider layout does not look correct, and images are displaying incorrectly.
If you have images that were uploaded prior to installing this theme and you are trying to show them in the featured slider, you need to install and run the free plugin called AJAX Thumbnail Rebuild.
If you're still experiencing the issue, it's because your images aren't large enough when originally uploaded to WordPress. They are required to be at least 650px wide and 360px tall (if you are using the small format of the slider) to work properly. Any size larger will work, as long as they are not smaller than that.