SO there is a maximum load that is specified by BMW... and to achieve THIS load, you should inflate the tires to the max pressure ON THE DOORJAMB PLACARD.

This can be independent from the maximum load for a given tire, and the inflation pressure to achieve that load.

My recollection is that you do not need to run tires at 50, 51, whatever to hit your maximum load rating that BMW states the car can handle. (and presumably BMW has determined 'at a fully laden configuration, the rear axle sees XXX lbs and therefore needs YY psi'.) And both of these numbers are UNDER the max tire load rating and max PSI ratings

So two different things... Correct?