For some reason, the OS Commerce pages display the sidebar widget. To remove it, place the following code in your functions.php file. I put it at the end.

/*-----------------------------------------------------------------------------------*/
/* You can add custom functions below */
/*-----------------------------------------------------------------------------------*/

remove_action( 'woocommerce_sidebar', 'woocommerce_get_sidebar', 10);

/*-----------------------------------------------------------------------------------*/
/* Don't add any code below here or the sky will fall down */
/*-----------------------------------------------------------------------------------*/