I think that is the expected behaviour: one email with attachments.
Perhaps you can force your email reader to show the attachment as an email message if the attachment is a proper email message in its own right? I remember that the email reader on my BlackBerry would show all attachemnts that are proper emails indeed as one continuing email and not as a separate attachments.
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James
My blog: Imperial Deltronics