Mail send by xpages form change group by user of group in sendTo field

Question

I developed an application that has a form where this form once completed is sent by e-mail as the list of selected group or user in the container. The problem is that when I choose to send e-mail to a group and click on the submit button, check the box to the e-mail client for lotus note that does not appear the group name but the name of all users in that group I selected. Anyone know why this happens? That is, when I choose a group and sending e-mail, Lotus internally changes the name of the group by the name of all users of this group.