Importing from another site creating problems with themes


I'm new to WPMU and have finally gone live with my first main site. My first user blog has now created a problem for me. I created it and imported the content from the main blog into it. The theme I'm using in the main blog is a 3 column blog. The theme that I imported the content into is a 2 column with the sidebar on the left side. Now what happens is I'm getting a two column theme once imported but it is on the right side instead of the left. ??? I have no idea how to change that. It was fine before the info was imported into it.

Can someone help? Any ideas how to change it so it is right?