When trying to update a Steam leaderboard, the source code currently adds the new value to the old value instead of replacing the old value with the new value. This works fine for something like a Total Time Played stat, but does not work when trying to update a high score list where the new score needs to replace the old score.
The code sets the stat value by adding the old and new values together.
The code sets the stat value differently, depending on what is being updated.
Head over to the existingAnswerHub thread and let us know what's up.