Ah, rats! Sorry about that. After some testing I figured out the issue . It does clear misses at 500, but only if you had misses when you reached 200. If you manage to reach 200 without scoring any misses, then it won't clear misses at 500, because the code is still stuck waiting to clear misses at 200 :( I think this is what might have happened to you?
I've updated both builds now with a fix so it should be working properly. Thanks for playing and letting me know about this issue! It's very much appreciated.