I Set Up Two Fingers for iPhone Duo Touch ID

I feel like I gotta set up both fingers on the iPhone Duo. Touch ID is in the side button, and during setup the screen shows you where it is. Hold it one way and it's over here, turn it and it's right up there, so I set up a finger for each way I hold it. After one finger, the setup screen says add another fingerprint. Yes, please. I bought the iPhone Duo myself. Download SayRay on the App Store: https://rfer.me/sayray