I just remembered that I had an older, regular sized, Evolution lock that I sold to a friend of mine about a year ago. Yes, it was a flat key. Both of these locks were registered under my name. I think what may of happened is that Krypto sent me keys for that lock. The guy I talked to was a little clumsy in his customer service skills and I had completely forgotten about that other lock.

I sent an email to my friend to see if my new keys match his lock.