Demoted for winning?

[keny01]

I won a game today and was promoted from Clever to Gifted. Then I won my next game and was demoted from Gifted to Clever.
Is this right? Seems I shouldn’t be demoted for winning. Maybe because of the way I won? In the last turn, I could attack the base to zero, or I could keep possession of the only opponent spawn point and destroy his last two units. I chose to win by possessing spawns and destroying all units. Maybe that was the clever way to win and not the gifted way?