element keeps jumping to sidebar column

[KeyElement]

Can someone please look at these 2 pages and tell me why the Features div is jumping to the right column and pushing everything else out of place when I add a php include (from http://skyboundmedia.com/longbranch/inc-sizes.php) into the Sizes div? My include code is: <?php include('inc-sizes.php'); ?>

This is the way the page should look:
http://skyboundmedia.com/longbranch

And this is how it looks after I add the include file or even just the direct content. (If I add just regular text with no table, nothing is wrong).
http://skyboundmedia.com/longbranch/index2.php

I have tried making the table really small too, and it still displaces the Features div.

I know this must be really simple but I am tearing my hair out!

Thanks in advance!!