I've tried to add shots to a previous list by pressing the "Arm" button, but it didn't work. On another note, if you want to delete a shot from a series (faulty reading) I don't think you can do it from the phone app. I also wish that the software app had some additional features. The Caldwell app is superior in that respect. You have the option to add a photo of your shot group to each saved group. And also has the ability to calibrate that photo and measure your group size as well as adding notes describing power info. I guess we can't have the best of both, but I sure wish Labradar would update the software/phone app.