So I took my roommate to pick up her new iPhone 6 on Friday. Picked it up at the Apple store and then went to the food court for some dinner. While eating, I watched her setup her new phone. I watched her input her index finger for TouchID. And that's it. She just did the one finger. What's odd is that she can use that index finger or her thumb (on the same hand). None of her other fingers will unlock the phone. Just the one she entered and her thumb that she did NOT enter. And it wasn't a fluke. She can unlock with her thumb over and over and over. Completely repeatable. Anyone heard of anything like this? The phone seems secure. No one else is able to unlock it (so far). Is this something to be concerned about? Should she make an appointment at Apple to get it looked at? Could her fingerprint and thumbprint just be really, really similar enough? I'm not really sure what to do at this point.