I'm pasting below an answer by "lkassuba" that was posted in a related forum and seems to also explain our issue:
lkassuba - 10:24am Mar 10, 09 PST (#2 of 2)
The problem is that the Form Distribution Wizard only accepts a single email address for the return data. Unfortunately this cannot be changed because the Wizard also applies Reader-enabling to the form so it can't be changed later.
As a work around you can try using the Wizard to create the collection DataSet, but not send out the form. Instead send out your original form with the multiple return addresses. Be sure to Reader Enabled the form for "Form" and "Save" rights, and make sure the submit is returning the entire PDF. When the files come back from the users you'll have to manually add them into the data collection.
I tried Pauls PDF, but I'm not able to open it without LiveCycle. (It says to be unable to find the forumlar because the XFA data reference is missing. Maybe the "#FDF" is missing. (Cannot translate that correctly since the formulation is very vague.))
Tried to copy it with LifeCycle, but didn't get that too 😞
Paul's script is fantastic. I've just figured out how to use it. My first time ever creating a form.
However, I've still a question about how to further modify it so as to also re-program the cc, subject line, and text body. I tried to copy script I've found in other forums but it doesn't seem to work here, perhaps because its already a re-programmed conditional button.
I keep getting a message error code 4' (invalid token) in reference to the scripts email subject line. Paul, would you, or anyone on the list know, what's the issue here:
RealEmail.event__click.submit.target = mailto: + DropDownList1.rawValueemail@example.com&subject=Re: Testing New Form&body=Please%20find%20attached%20the%NewForm%21″;
However, when I'm now using exactly this string, then I get an 'xml parsing error not well formed code 4 (invalid token)' for column 107, i.e. between "subject" and "=". Would you, or anyone on the forum know how to fix it?
RealEmail.event__click.submit.target = mailto: + DropDownList1.rawValue + "?firstname.lastname@example.org&subject=Re: Testing New Form&body=Please find attached the NewForm.″;