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Would you please explain what this means?

Also, for the third time, are the scratches happening during one or both stropping directions?

As Rodb asked, are the scratches occurring during one or both stropping directions?

Also, are the scratches on the strop happening from the heel or the toe end of the blade?

Run the edge of your fingernail along both sides of the razor spine where it contacts the strop. If the spine is causing the scratches, then the defects in the spine should be catching your nail.