I'm stuck on this ReBeater level. It says "Your current level: 14." I swear I am matching the beat that I'm hearing. They sound the same. I tried it with 4 different drum kits to see if there was something else I could hear... is it possible there's a bug? I might be just getting it wrong, but I don't think so. Especially because earlier I was trying a BeatRace and the clap wasn't playing. I'm concerned that there's some element of the groove that it's not playing for me. Thanks for any help!