Conflict Region Location and issue on switcher

Hi
I noticed a big difference between what states the Multilocation->Locations and the locator editor inside listing edit. A live example better explains:
as someone of you already know ( 😉 ) Rome is under the region of Lazio, and under the provence of Rome. Since we can have country/region/city, I choose the provence as region, so in Multilocations/Locations I have
Rome, Rome, Italy (and in post_location table I have [rome],[rome],[italy] ) and not Rome,Lazio,Italy
(see attached)
but when I add/edit a listing of Rome, the Region it shows me is Lazio (see attached). It should be Rome (or I should select from what states the Multilocations list).
Through this, in the switcher location there are duplicates of city like:
Cervia, Ravenna
Cervia, Emilia-Romagna
(see attached)
and the listing are not shown

Is a bug? How can I fix this?
Thanks for help