Sounds good. Glad they are doing well for you. Keep it up.
Stat bars should always be treated as a guide. You'll need to race the horse before you know what you've really got.
Who your off-spring come from is a key factor. You may often find that one horse, who visibly looks more impressive, but from a weaker bloodline, will not match up to a horse who looks a little worse, but better bred. Of course, it's always possible to have the reverse result.
There are many "hidden" stats behind each horse, those that can't be truly measured, such as courage, determination to win, etc. You'll only discover those after you've seen your horse race. If the parents showed signs of poor traits, despite being winners and having high stats and ratings, there's always a chance that they'll pass on these poor traits. Watching the youngsters, will tell you whether they get these traits, and help you decide if you want to continue breeding from these mares and sires.
You'll find a few diamonds in the rough, and a few that blackpool beach won't take from you, even if you paid them
Keep up the good work, and pay attention. You'll start to see different trends, etc, and that will help you shape your bloodlines in the manner you want them.