duplicated widgets

hello, i wanted to add a widgetized area in the header instead of the banner image shown by default, so i added this <?php bfa_widget_area('name=My new widget area'); ?> in 'Style & edit HEADER AREA: Configure Header Area' but instead of one widget area i am getting 3 new widget areas .. and i just want one widget area where i can put google adsense code for horizontal banner. also the widgets placed in these areas are not showing on the home page but instead on post and other pages...please help