Cognos 10 Content Store- Double in Size after Import

[DrunkenIrishMan]

Exported the full content store and then changed the CS connection to a new oracle 11g environment which was empty. The connection tested fine and I logged back in to cognos connection and proceeded to import the content store  and populate the new oracle 11G environment. all worked fine and report specs etc look good. Problem is my content store has doubled in size. Is there a piece that i missed along the way or does there need to be some configurations to the content store after importing.

Any help would be much appreciated. This is my first post.

Thanks
Thomas