My cam cover bolts follow the parts diagram.
Copper washer goes first on the bolt (T3550003 Washer 12 x 18 x 1.2) then the rubber seal (T1260309 Seal, Cam Cover, Screw, Twin Lip).
When tightened up, the copper washer embeds itself into the rubber seal so much you'd think it is one unit. I certainly can't separate them without destroying the rubber seal. This is the best one I managed to salvage to demonstrate. The rest were mullered, in fact the rubber stuck to the cam cover so much they tore to bits when picking them out of the cover. So new rubber seals and copper washers for me.
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