Unlike ordinary games, those games with AI (bot) are automatically scored by the server (not by the bot), and this scoring sometimes being incorrect is an issue ogs developers are working on.
If the incorrect scoring results in your losing a RANKED game that is otherwise won with a correct scoring (such as in your case), click “Call moderator” on the right side icons on game page, typing in “Incorrect scoring? Please adjust rating” and sending will get your rating points and rank adjusted properly within a day or so.
Please note that the game results cannot be changed retroactively by the moderators, so your game record will remain with the initial incorrect scoring and win/loss result. So please do not do the “Call moderator” if the miscalculation did not change the win/loss status, or if the game was an unranked game.