Given the green leaves instead of blue and the much narrower margin, I'm wondering if you either received a plant that was mislabelled or got it posted in the wrong place. Or is it a very young plant?
Might do. Is the nursery in your neck of the woods? I suspect that your more southern location has an impact on your hostas as well - I've noted several that seem a bit different from the majority and that could certainly have an impact on blue hostas in particular.