Hello there,
I'm not sure about the "win a battle on offence" achievement, and I'm sure someone from the team can look into that for you.
However, for the underdog achievement in 3v3 you have to use a team with only 2 characters or less, one of which much be GK.
This was changed in this update: https://forums.galaxy-of-heroes.starwars.ea.com/discussion/196183/server-update-2-21-2019 on 21/02/19. Previously any battle in 3v3, now you need at least one empty slot on the team.
Did you use a 3 man team in this round of GA?
Hope this helps.
I did use a team of 3, which explains the underdog wins not counting. However my total wins with Kenobi has remained the same.
It's a shame things like these negatively effect some players while players who finished this mission early managed to have an easier time.
Same here, also stuck at 6/10 after my win didn't register yesterday
