Theme issues

I installed the K2 theme and love it — except my sidebar is now displaying below my posts and my CSS knowledge is too retarded to fix the issue. Something to do with the div tags I guess. Apologies for the break in usability. At least I got to clean up things and have a WC3 verified page.

I need to essentially figure out where the sidebar.php is called into the index because the sidebar is happy in the archives.