Quote - Which morph actually makes the breast lie against the ribcage like a real large breast would do?

Heh. At the risk of sounding sexist...I think this is the problem.  The morphs at RDNA are very nice morphs, but they don't all play nicely together.

I believe the person who made the morph set is female.  She probably didn't think to check every morph with the boobs dialed to "ginormous."  While I suspect that's the first thing male purchasers did.  ;-)