How to I stop my calendar from copying my events/meeting into another calendar?

I just got set up on Outlook at work.  I want three calendars: Public, Meetings/Schedule and Private.  Public and Meetings/Schedule will be public.

When I set up a new calendar then calendar copies my dates and meetings from my default calendars. (which I made my public calendar and opened up permissions.) When I delete a event in one calendar its deletes that event in all the calendars.  I want to separate these calendars, so they tracking is for difference purposes. 

I set up my Private Calendar under another Calendar Group, and set up my Meetings/Schedule Calendar as a shared calendar.

Please advise.