Styling in IE problems

Hi all,
Basically, some of my elements are in different places than I expect when viewed with IE – firefox is fine.

Examples include the H2 for single page items getting pushed to center alignment and the comments getting bumped across the page to the wrong place.

This URL shows both issues, any help appreciated!

https://www.realepicurean.com/index.php/archives/hughs-chicken-run-2/