I'm taking bookings using this amazing free plugin on my website (thank you devs for making this plugin available for free).   im taking bookings for salon, and we have limited seats (6), now this plugin only allows one slot to be booked by a user at once. so to work around that limitation, i made a custom user field where i ask the user how many seats they want to book (incase they are coming with a partner or friend) and now to manage slots what i do is i clone the appointment from the wp-admin page.   now the questions i have about my workaround are these:

1. does the send email notification uncheck botton disable (email to user/admin/worker) all or just some specific one?
2. if it doesnt disable confirm email to user, is there any way to block available slots manually?