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Unless I have misunderstood the scoring system, on a given difficulty, the lower the Game Stats %age the higher the score? I have two screenshots showing otherwise.
Are you asking about Elo scoring?
Post the screenshots.
And if you're asking about Elo read this: https://www.freecell.net/f/c/elo_about.html (that's from the Score page, right column)
MrFixit
The elo of a game depends on who has played that game. If it was played a bunch of players who all had ELOs of over 2000 then the game itself might have a high % win rate but still cause a big ELO jump for a player with an ELO in the 1700s.
Go to your recent play list and look at the elo of the game itself.