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Just curious, if I understand this correctly all three blades have this problem. Have you heard back from the maker yet ? If three out of three are like this, it seems to me that you are probably not...

I've sent a PM to an expert in metallurgy. Particularly as applied to razors. We'll see if he has time to opine on the mystery.

Never heard of that, if you could post pix of the edge under magnification it would be helpful.