My product key to register my "Apple Wireless Keyboard" is 18 characters long, yet the registration only allocates me 16 characters. I bought this product from Best Buy. The connection to my iPad works without any issues, no problems on my laggy iPod Touch 4th gen on iOS 6.1, either. Only problem is that I apparently cannot reigster this product with Apple's warrenty information stuff and link the product to my account. If I could get some help with the two characters that would be great! Thanks for any reasonable help ahead of time.