[Dx4win] Logging mobile rover stations

[Endorf Family]

Logging mobile rovers: (maybe better stated as importing an ADIF)

If I work W1AW/m mobile in Polk and then again later in Lake counties, I
have logged them as:
W1AW/POL
W1AW/LAK

When I bring them into DX4WIN I have worked prefix's PU0 and LA0, and have
worked two countries, not the state they were in. I can manually fix each
one, but it seems to remain that I have worked two new prefixes.
This doesn't happen to every entry. Some come in as the state and county
automatically, and don't have to be edited, and some don't. I can't log them
as W1AW/m because every QSO gets the same information?
Anyone have tricks or tips to get this info imported correctly, including
prefixes?

Thanks
Mark WA0MHJ