No notifications for filtered (excluded) calendars

Please give the option to only send appointment notifications for visible calendars i.e. that match the view filter criteria. My case: my Outlook account is subscribed to some of my Google calendars, so I can have a combined view of my calendars. In OneCalendar I then merge my 2 accounts Google and Outlook . Hence I deselect the duplicate calendars that appear due to Outlook giving them to OneCalendar as being part of my account . This works fine,only that OneCalendar gives duplicate notifications for appointments: they exist twice for OneCalendar, but as one of the calendars is hidden, notifications should pop up only once thank you very much advance!