Appointments+ Gcal test working, but live appointment detail not carrying through. Any ideas why?

I've setup Appointments+ on a site, and I've integrated it with GCal, when I send a test appointment it works fine - and all the strings passed over (city, service, time/date etc) all parse correctly and complete in GCal, however whenever I try and do this from the website on the appointment form and make a booking, the information doesn't get to GCal, even though it is captured in the list of appointments within appointments+