BTL is not just 70kgman. BTL is a combination of my plays, and his plays.
So whenever I win or lose a game, it will count in the BTL record. Whenever 70kgman win or lose a game, it will count in the record as well.
If we will be playing against one another, I will skip the play for the BTL record, but count my own play in the record for my system.
Hope it's clear now?