Hi eggplant
Q1 - MyLog gets its data from NavData, not the other way round, so any changes that you make to MyLog only apply there. You need to update NavData separately, then updates you make there will be applied in the future to new records in Mylog - hope that makes sense!
Q2 - potentially, yes, as it might well be when RadarBox auto-populates from the AirNav server. This is a part of the problems that we hope AirNav will be looking at when they update the whole issue of the Database.
Rod