This was what the immigration explained to me. So with the example you wrote as above, the rule of the immigration still holds true: Whichever the date is early, the VISA expiry date or 14 days after being terminated. For example, a helper's VISA expiry date is Feb 15:
A. If her last working day is Jan 1, then she has 14 days to stay here which is Jan 15 (a date earlier than Feb 15)
B. But if her last day is Feb 10, then she has to leave HK on Feb 15. (a date earlier than 14 days after Feb 10)
So whatever the case is (i.e. early termination, early release, finish contract etc), the immigration's rule is always true, no mistake!!!! except if a helper applies for VISA extension.
BTW, the immigration said in the case above, the helper's last working day is Feb 14, not Feb 15 because 1 day extra is for her to leave HK not working!
This was what the immigration explained to me. So with the example you wrote as above, the rule of the immigration still holds true: Whichever the date is early, the VISA expiry date or 14 days af ...