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I probably should have been a bit clearer, they have the washers above and below, but an extra washer below the bottom conical ones, similar size to what you get behind caliper brakes. (So a total of 5 big washers per bolt, instead of the 4 you'd expect).
They don't appear on any of the BB7 images either. I reckon original owner added them for pad tab clearance.
RonnieOatmilk
BB7s are supposed to have washers on the top and the bottom of the adaptor.
Incorrect rotor size perhaps?