Hello,
No, it is a plugin issue because I have checked the US.zip file before posting my remark and the state of “West Virginia” is correctly present in it with all its data like any other states.
I have checked also your plugin and how you are inserting the data into the db and you are using the close IGNORE which would simply skip all non-inserted data without throwing an error. So maybe many other entries have the same problem and could easily go unnoticed.
I think you should definitely check it.
Thank you.