GW 8.0.1

I created a calendar and shared it with 6 people. When someone posts an appointment to the shared calendar, the appt goes into both the shared calendar (as it should do) but it also puts the appt in all 6 people's personal calendar too.

- Is this how the shared calendar's are supposed to work?
- If so, is there a way so that appt's sent to the shared calendar are only posted in the shared calendar and not in the personal calendar's too?