Are they firsts or seconds? Either way, I think it's a pretty insignificant issue over which to fret. A large, unsupported piece of leather like that might even have a chance of creasing during shipping. It will be hidden under your pants. It's a portion of the boot that you will slightly wrinkle and crease while wearing and storing, but if you truly aren't happy, just send them back and try again. I just don't think anyone is going to even think twice about those creases, if they even see them, and the boots aren't going to stay pristine if you ever wear them.