Team calendars allow you to add restrictions to a calendar, so that only the proper users can see/edit it. However, it is not possible to grant edit + view restriction for the same user.
- Create a calendar.
- Set the restrictions to Only specific people can view or edit
- Add your account.
- Set the restriction to Edit.
As it happens with page restrictions, the calendar should be restricted that no one can see it, and only you can edit.
Only the edit restriction was granted to you - the calendar doesn't have any view restrictions. You need to apply at least 1 view restriction for the calendar to be restricted.
Grant view restriction to a group you are part of. This way you'll have view restriction from the group + edit restriction that is being granted individually.