I notice on some contacts the ITU zone / CQ zone are already filled in correctly (from the country file in either cqrlog itself or in fldigi) but when I try to update the rest of the information from qrz.com those fields sometimes get blanked (I guess those weren't filled in at qrz). Updating the record after downloading from qrz will reset ITU zone / CQ zone to 0, later showing up as blank.

Would be nice if the zone information was kept as is when there is no valid information from qrz. Sample callsign which shows this is MI6JVC (no offense to said amateur).