Originally Posted by
supermasterphil
I never managed to change my seats afterwards (online). Basically, you have to call them up and they will take care of the seat change.
...and if you call them up, they will change it for you, but then the computer will randomly change it to some other seat a couple of weeks before your departure. Then you call again to get old seat, then it will change again, etc... I have played this game many times with LH.