confirmation sent to more than one user, wrong buddypress link and ability to cancel from frontend

I am using this plugin to manage meeting rooms in my intranet. I need this to send the confirmation email to more than one user. Is it possible?
I also need the person who did the reservation to be able to cancel it from the frontend but I can't see how as it seems only the admin has this power.
Is it also possible to let user pick more than one block of time? That would be great because each user has a different need in terms of how long the meeting might take.
Also I have "Appointments" tab in my Buddypress menu but it links to my "all members page" - how to fix that?
If you can assist me on that I would appreciate a lot!
Thanks!