For one, it's not the "official" Sheila, but a card made by fan, since the dev won't leak the card before the game is finished from what he said. (So even if it properly loaded, I think there will still be a difference, even through the one who made it made a good job ^^)
Then, she look strange because you don't have the right mods (It's often that a card use a mod for the hairs, clothings etc..). You can either go to the download page where you found the card, or try using HSResolveMoreSlotID, a program that should tell you what mods you are missing (But some mods are hard to find).
As for the lighting, I think that's because not much people use the stock lighting parameter from HS for their renders. But I don't really know if you can have something good by tweaking the parameters, if you need a mod, or even if people share their lighting parameter on the web.