In fact, RIAA forgot to add MTV Unplugged to the list, the sum now is 73 MILLION.

One link shows 69 and the other 71, but I checked and it should be 73.
All the albuns shown in the 69 segment are right (plus 4 million, MTV unplugged.)

How can we ask them to correct?

Anyway, just want to point that out. Thanks.