>The last entry doesn't have state information. Do you know where Chepstow city is? It looks like this city is in England (Google confirmed it and the mail suggested the same). Why then it says USA?

As Hilmar mentioned, this is the default entry. We don't have any validation at that level to go further as to know if a city is valid within a country. This is pretty much the same situation you encountered at several occasions recently when you enhanced and fixed some members info.