The parkers I have seen have slight smiles usually. A frown develops for a few reasons, one being a warped edge or convexed hones. Unfortunately you need to at least get the edge back to straight, you’ll lose a lot of steel in doing so. Learning techniques to combat a seriously warped blade is best done under the supervision of a mentor, you can also greatly speed up the process of getting proficient with your setup, which is very nice by the way. It would be worth while to pay attention to people’s avatars and where they’re located and if they’re a mentor, find someone near to you and send them a pm.

Do you have other razors, in need of honing, that you don’t mind possibly screwing up? If so find one that’s pretty straight. Start using tape on the spine too, until you get your strokes figured out it will help keeping you from introducing more problems by unevenly grinding away at the spine.