Reps are stored locally on your RepOne Sensor until they're manually cleared. Each device can store approximately 100 reps, and as you perform each rep past 100 your oldest reps are deleted to make space for new ones. If you see a rep number past 100, that's why. If you'd like to start with a clear slate, possibly at the beginning of a new workout, you can tilt right twice and follow the on-screen dialogues.