A few things:
-If she's in U8 events, and she's not under 8, she's going to be penalized. Horses over the age limit are not meant to win.
-Most people choose to Meth x3, Turn, Cure x1, let horse sit for events. If the health is not full (happens if you meth and don't cure) or hyperness isn't "full" (happens if you don't meth x3 after training) then the horse isn't going to do as well as a horse that has full hyper AND full health.
-Hidden factors may not be as good. Your horse's personality is different than the winners (didn't check all of the events, just a few), height is different, etc. That could play a part.
-There's more to eventing than just which decimal numbers are highest. Horses with slightly lower stats frequently beat horses with higher numbers because of other factors. For example, the theory is that stats are a ratio. A horse that is 205 Speed, but only has a stat title of Superb is going to get a better score than a horse with 205 Speed with an Extro title. The idea is that it's harder to raise a lower stat to the same decimal number, so the farther you have to raise it, the more 'points' a horse gets towards its final score. So even a 204/Superb is going to be better than a 205/Incon, because the person had to work a lot harder from the beginning Superb stat (around 86-87) than the person who had the Extro stat (around 97-98). Subtract the ending stat from the starting stat, and you can see the difference in gain: Superb (205-86) gains 119, Extro (205-97) gains 108. The horse that gains more to get to the same place tends to score higher. Of course, it's not that simple with all the other factors that go into eventing, but just because a horse is BC doesn't mean it's automatically going to beat one that isn't.
