Yes, I see the cause of your problem now. In brief, the new high-res breasts can't use the morphs for the original P4 woman. That's the main disadvantage to increasing the vertex/polygon count on a P4 body part. You may have to create new morphs, or modify the old morphs. To use the old morphs, you have to export them one by one and use the same procedure on them that was used to increase the vertex/polygon count on the high-res breasts body part. In Carrara, one such procedure is called "multi-res subdivide". In Amorphium, it's called "quad". Very easy to do with a few mouse clicks, but tedious when trying to go through dozens of morphs.