Booking calendar not adding correct notification

I have used YCBM for years, all of the sudden the last two months when a client books through the booking form the system is adding a 30 minute reminded notification but I have it set as always to remind me not via notification but instead via email and 1 day in advance, I have to keep manually changing this in my calendar!

@sunfruitdan welcome to the Forum! On the booking page I see you have two reminders set up to go to you 4 hours and 1 hour before the start of the booking. You may have a notification from Google coming 30 minutes before. If that is the case you can edit that here:
https://calendar.google.com/calendar/u/0/r/settings
image