iphone 6 notifications disabling "show on lock screen" is still showing up in lock screen
It sounds like you may have disabled notifications from displaying on the lock screen for some Calendar notifications, but not all. Go to Settings->Notifications->Calendar. From here, you can choose which calendar notifications are displayed on the Lock Screen (upcoming events, invitations, invitee responses, shared calendar changes, events found in Mail). If you don't want any Calendar notifications on the lock screen, then you should turn the setting off in each of these submenus.