Now, V2 came as a real surprise. I thought because she has the same large collars as Antonia, I'd see a similar problem. But in fact in terms of symmetry, she's quite astonishing. Not only is the base mesh practically perfect, but, although one sees the the typical pattern again in the render, the asymmetry of the mesh exported from Poser is so small that when looking at the wire frames, it is impossible to tell that we have an overlay of the mesh with it's flipped copy. It simply looks like one mesh.

So, the conclusion so far is this: Poser always creates asymmetries in our meshes, but the degree varies between figures and between body parts. Your mission, if you choose to accept it, is to find out what makes V2 so special.

-- I'm not mad at you, just Westphalian.