I also have the SC and go4 on it and go4 on my iPad and they are different too .
I have tried syncing up down left and right but the numbers don’t match .
I flew yesterday
One says 1flight
An other says 2 flights
And HD-sync says 3 flights .
I can only think I screwed something up a while ago and it created an offset and everything since has been affected.
I’m not sweating it , I don’t think it’s a big issue but it also would be good to fix it or find out why it’s happening.