Better QC @ Factory
What I think is happening with your ram, it is being labeled wrong as it goes through production. Many times a worker pulls the wrong label off the sticker machine and doesn't double the number to the order he is sticker'ing.
Get down in there and run a 53 week assessment of the floor, maybe do it under cover as a temp to see why so many people are getting wacked reading from cpu-z like 1066 reading 800mhz and 1333 reading as 1066 .
Just some advice
Be well
