I have been staying at 2 ICs in Hong Kong, and even in the same area I see differences in either the operation or the interpretation of the upgrade policy.

@IC Hong Kong, booked superior junior suite, upgraded to deluxe junior suite, with a comment mentioning a one-level-upgrade policy re suite categories
In my case the assigned room is only a bit special one in that it is with a terrace, but... it does not look nice to include junior suites in the exemption list...

@IC Grand Standford Hong Kong, booked premier suite, upgraded to premier harbor view suite, with a comment mentioning a two-level upgrade policy

I understand there are some exceptions to the rules according to a guest's profile, but maybe T&Cs are interpreted differently from one property to another one
And the upgrade policy is neither a first matter nor the only one that I see such differences are occurring...