YOu have tags in your theme that indicate a sidebar
<aside id="sidebar" class="maxheight">
</aside><!--sidebar--><aside id="extra-sidebar">
</aside><!--sidebar-->
But nothing in them
In the appearance->widgets area, does your theme have some sort of Extra Sidebar, or something where you can put widgets? Perhaps your theme is configured to have a different sidebar on the fornt page?
Hi,
I do have extra sidebar, but it configured exactly the same as the original sidebar.
Where did yo get your theme from? If it is from this site, we can download it and look for an error.
If not, you would have to take your issue up with the vendor (especially in the case of a paid for theme)