BBC Not Working in Contact Form?

I am trying to add a Bcc: to the additional headers as per the instructions located here:
http://contactform7.com/adding-cc-bcc-and-other-mail-headers/

I added to the additional headers field: Bcc: name@host.com

However, I got two emails both to the main address of the contact form. The BCC doesn’t work?

How can I fix this please.

I need my site’s main contact form to send to both me and my business partner.

My site’s main contact form is located here:
http://www.sojha.com/contact/

http://wordpress.org/plugins/contact-form-7/