When a track or WR is transformed in Track with the Mark track tool, each straight line is transformed into its great circle equivalent.
It is the same for the track designer : if you try to trace a line at 90º 300NM long, it indicates 92º : it's the direction of the start of the great circle.
Most of the time, you don't want to take the great circle route but you want to go in a straight line and you want to know the time and speed of this straight route and not the GR route.
It is also maybe the cause of the time difference I get every time I transform a track in a marked track : The marked track is always longer than its "father".
Also, in the case of a WR track transformed, it creates a lot of points and small route changes.
It makes the "show action text" unusable because there is too much not relevant information.
Same for the scheduler : a lot of alarms are created for nothing.
And again, thank you for your time