Well, I'm viewing the page using Netscrape 4.78 on Linux (a very lame excuse for a browser, IMHO! I greatly prefer Opera...), and the "PARENTS" button is higher. As well, the nav box on the left has some hokey-looking borders.
On the menu across the top, pull the break tag (<br>) out from underneath the Parents image link. It's pushing that td cell up.
On the left nav bar, you have font closing tags (</font>) which don't appear to match any opening tags...
Start from there. And double check that opening HTML tags have matching closing tags, etc...