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It WAS a warped spine: I ground it flat, and both sides (bevel and spine) have the flats you would expect from that. Sitting here typing, I realized that grinding it flat probably made the bevel...

Interesting followup here. I took the notch about halfway out, but then started second guessing what that would do to the bevel angle, spine, etc. Remember that on this razor I had to straighten...

Dang! Kids were all on the bathroom counter watching me shave and being their typical monkey selves, and I got distracted. I dinked the heel on the edge of the sink, put a nice notch right there.
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