So I have a mix pack of blades I have been working through. It came with 3 types of Derby blades: Derby Super Stainless (green box), Derby Stainless (blue) and Derby Premium (black). I noticed after using one of the green box this week that it had a weird wrapper that didn't say Derby. And the black one has the same thing. But the wrappers on the blue box do say Derby. Is this something legit? I noticed that the blade doesn't feel that great on my face.