Once I won a game but I lost my points
Which game? Provide a link.
I got points,but it shows I lose points
Iosed
As notmtwain says, show us the game
K
https://www.chess.com/live/game/2528139874
Looks to me like you got your 5 points for that game- the one against Omrysr.
.
If you are playing on the app, it will sometimes read a cached entry on the rating change. So, it will show the value from a previous game, when in fact, on the server side, everything worked correctly.
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Once I won a game but I lost my points