No. You said you had 'bought' a template, which usually means from Template Monster, who tend to hack a lot of files unnecessarily and add a lot of extraneous divs. If we can't examine the site using Web Developer or Firebug, we have no way of knowing the class or id of those boxes.

If you can view the site with one of those tools, and discover the class or id that controls them, try setting a height for that class or id in the stylesheet to make them all the same.