It is due to the way Vb puts the post together if you look at the HTML of it...
Notice where that Gray HR Line is - if you continued it across the whole webpage it would come just below where your avatar and all your user details, that fills up that left hand side.
Basically Fire$torm your gonna have to mess with the template - I suggest making a copy of the current template and messing with it -
the part your looking for is anywhere that has 'CLASS="after_content" ' that's why it punts it to the bottom of ALL the content.
I may be able to help a little with that going to see how our template handles it...
Just looked seems it handles it exactly the same way... There still might be hope