I'm thinking that this might be related to the known PFP issues which you are in process of fixing. But just in case it is something different.... see attached screenshot.
The PFP score is relative to itself as well as other horses. This horse had some very bad races early on and lost almost all it's points. Since then it's been climbing back. He went into the race where it came 8th with a PFP of 1055. The average for the race was 1467. Despite the horse coming 8th, based on it's current score of 1055, it still performed 6 points better than this score, hence the increase in points. I hope that clears it up 🙂
sorry.... that should be Hamilton