Page of Posts–All Posts Not Formatting Same Way

Hi,

When I view my blog I have 5 posts listed per page. The bottom two (my first two posts) are not showing full images but rather thumbnail images and full text. With firebug, I see that the css code shows image set to thumbnail yet when open post to edit and view html format is shows code that other posts have (full, align center). So I’ve played with the settings, format/excerpt settings, even deleted and reloaded image to posts. I’m sure it’s a very simple problem but at the moment I can’t see what it is. Can anyone help? Please see below.
https://www.christineutterberg.com/?page_id=623

Thanks!