neither can I make them disappear. I can only merge a zone under a city into another zone under a different city.
So, a lot of them I can't do anything with, and the few I can, I move the zones but the incorrect city names still show up at the province level.
I think at one point, any user can add city names, so for tourists who don't know the administrative zones/province/states of the places they are visiting, they simply create a new "city" or "province" which can't be undo now.
Hopefully someone with stronger management power can come by and fix them.