Home Page Jumping When Feature Image Changes

I am having a problem with my homepage jumping as the featured images in the slider change. If someone is reading the content below, it is annoying because the whole page jumps. I reduced the issue by removing most of the photos from the slider. Most of the images are 1280 x 960, a one or two are 1280 x something close to 960. How can I stop this from occurring? My URL is Thanks. Since the url doesn't show up when I add a link here for some reason. It should be www.lehighvalleygenealogy.com