Can points be lost for winning a game?
Generally a player cannot lose points for winning a game, but there are some circumstances that it may happen. If a player has lost a previous game but that game has not yet been counted when the next game ends, both games will be counted at the same time (from oldest to newest) so it may appear that points were lost, even if for that particular game, points were gained. Another common reason for the game results to show points being lost is because of inactiviy being counted as well. Since the comparison is with the previous game played (not the points before the game), there may be an increase in sigma from inactivity counted in the point difference. There is also a rare situation where there may be a small loss of rank after winning a game if the game is severely imbalanced (such as three shamans allied against a brave).