Board Game Arena

I'm confused about the final scored posted after the game is finished:
https://boardgamearena.com/table?table=571588038

I understand that the lowest score wins the game, and in this case, nairobiny won.
However, at the link I posted above, it shows nairobiny with a positive score, and the other player & myself with negative scores?
I guess I thought it would match up with the in-game score, where negative scores are best.
Thanks for any clarification.

BGA does not know how to win the one with the lowest score and I take the opposite values ​​so that BGA detects the correct winner.
This is the only slight violation of the rules and it only concerns the final display.

Thank you for the explanation!