Remove an Appointment from shopping cart


I’ve just installed marketpress and have a couple more issues

1) When I make an appointment and put it in my shopping cart if I change my mind and decide to remove that appointment it doesn’t remove it from Appointments+. The time is still blocked out and the appointment is sat as pending. Is it possible to integrate the two better and move it to removed so someone else is able to book the appointment immediately. I have pending appointments set to delete after 20 mins so I presume they will be come available again after 20 mins.

2) Currently I can book an appointment and go through to the marketpress cart but then manually change the quantity to 2 or 3 or 4 etc. I want to disable any changing of the quantity here as it should all be done through the appointments+ plugin properly.