But upon opening the email from my sent folder, the 'To:' field only shows the two people I intended on sending it to.

Is this a program glitch, or have I actually sent this message to this extra email that I did not input? 

(Example-- I send to *** Email address is removed for privacy ***, and when I check my sent folder to make sure it has gone through, I see in the left hand column that it was to *** Email address is removed for privacy *** AND *** Email address is removed for privacy ***. However, when I open the email to my right, the To: field still only shows "*** Email address is removed for privacy ***.")

Please do not redirect me to windows live help, because that website is not functioning.