Not sure if you're still having this issue. On the iOS version I have, there is a setting button in the upper right corner, and one of the selections is for scores over 60, which by default is not checked. I interpret that as a way of only giving you changes under that count, so once you've entered a score above 60, you'd no longer see those changes come up. I haven't tried checking it, but I would expect doing so might fix that issue for you.
What I'd like to see is an easier way of selecting specific chord changes to practice. Unless I'm missing something, the only modes are random and problem chords. Sure I could uncheck all the chords except two or three to get only those to come up, but if I wanted to practice a specific set of five, I'd have to keep stopping and changing the configuration after each chord change. It would be great to have a way to just pick specific chord changes and "queue" them up.
Another great feature would be some simple graphs to show progress over time, certainly not mandatory but might be motivational to see the counts zig zagging upwards.
Thanks for the free app, it's been a great help.