I found a little bug in the dbem_rsvp.php file that was preventing the Event Contact's email address from displaying properly in the email to the user.
Move the following code at line 355:
$contact_email = dbem_get_user_email($contact_id);
To line 344 right after this code:
$contact_name = dbem_get_user_name($contact_id);
Now the Contact's email address shows up perfectly in the RSVP email to the user when you call for it in your RSVP settings.