I also am having this problem.  I initially entered the employee email address incorrectly.  The invite was sent to an incorrect email address.  When I edit and correct the email address in  the employee's information, it does not let me change it in the "invite" screen.  I've seen the information about canceling the invite, but I do not have this option.  I also saw the suggestion to delete the employee, but the employee has already been paid twice so this is not an option.  Please assist.  Thank you