Calendar Bug?

[Manuel]

I have posted this in the user forum but I think it's more suitable to post it here.

Scenario:
BOSS - Calendar shared with Staff (with View Access)
Staff - Calendar shared with BOSS (with Manager Access)

- Staff created a new calendar entry

When BOSS edit/modify the calendar entry of Staff,
- Once click on save, it say "1 appointment moved to 'Calendar'".
- the calendar entry ownership becomes the BOSS's
- Staff will not be able to edit the calendar entry anymore

Is this logic correct? or is it suppose to work this way?
Or did I do something wrong?

Thanks.