It is just an updated label all of the MMv3 has both in it, the product has always been mixed from what Eric AKA LegalGear said. They both have a little of each isomer. However predominantly one or the other. I think he covers this in the latter portion of the Androsterone thread linked previously. You should check that thread out regardless as many Androsterone products are now on the market or will be by next year.
I honestly cant get into why the label says what it does or why it was changed, all that would be speculation on my part. I don't want to get into a big guessing game on that. What I can say is the MMv2 was definitely better for adding mass and strength / recomp is the main effect with MMv3.