I think you are making exactly the same mistake I was making when I first started messing with Greyhounds.

When you do the ratings , the better performed animals appear at the top.
But you must learn how to differentiate between top rating Stayers and top rating Sprinters.

Like - When Stayers in horses roll up to prepare for their Spring Campaign in Sprint races , how do you stop them from being the top Raters in 1200 metre Races?

Whatever you do , you need to learn to do similar when Greyhounds are in the wrong distance race.
The example i notes yesterday was IRON BRIAN.
I also had it up top when the Computer spat out the ratings , but I adjusted it to out the gate because I was pretty sure the distance was way too short.