This bug post is old but I figured I'd post here because I am having the same issue 2 years later. At the top they show as the correct breed but once I get to the bottom they all show as TB. Horses that are actually X, SH, AA, or KNN(just the ones I've ran into) have TB as their breed. I can provide screenshots of the dropdown and then the horse if needed.

Edit : It only happens in the match straws, the watch list mares and watch list all show the correct breed.

Adding screenshots because I am experiencing this too!

The top four are right, but blackie is a AA, Leo Temptress is a KNN, and Cosmic Love is a TB!

I also had this problem with them not listing complete breeds. It was in the mares you watch but your studs. It would only show the first letter. Like (I) and (W) rather than the full breed. Which isn't a big problem because it's not the wrong breed but still wanted to let everyone know.

Mine has the wrong breeds on it too mine lists everything as SH but they're not