I'm not sure what has gone wrong but I suspect somehow WSJT-X, JTAlert and my Log4OM database are not in sync. Often (but not always) I see a known DXCC country highlighted in yellow, whereas I have already worked that country on the same band. I'm guessing WSJT-X isn't properly pointed at the database file used by Log4OM? I have rescanned the ADIF log but no change.