Disappointing... Very disappointing

Why can you not unlock more training? I see the locks in shaded grey, but it seems the training maxes out at 20? Also what is up with the other horses and their infinite bursts of speed? There are so many other faults with this game, too numerous to list. Once anyone plays it for a few hours, youll see what I mean.

Senaks about Derby Quest: Horse Manager, v2.1.1169