Are spines on straight razors always flat, or on some blades such as smiling ones will the spine be different to accommodate rolling strokes?

I have this straight razor that I restored Imgur: The most awesome images on the Internet and when setting the bevel (3 layers of tape) the bevel is fine everywhere I would say other than a spot between the middle and heel on one side.

I have not spent much time on it but would I just keep using rolling x strokes with tape on 1k maybe DMT 325 until full bevel is set or would I need to do some work on the spine.

I have had a straight razor where I taped the edge and used DMT to flatten spine but this was on a blade without a smile.

Picture of the bevel on the razor (3 layers of tape) I circled area where bevel is not being hit. I would say I have spent 30 minutes to an hour using 3 layers of tape and rolling x strokes
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