The joke, if there ever was one, is that the "reweld unwelded groups at import" is one of the oldest bugs in Poser. But SM can not "fix" this bug because it wants to stay compatible with the old content. And unfortunately, the old content has lots of unwelded groups in them. The most widely known example being Posette-Dork.

Go over Posette-Dork or ALyson2 in a modeling app, and all double vertex start flying through the sky. And one does not have to be an ambassador to see that. LOL. (But not all apps show it either)

Then comes the fitting room, then comes the "how is it possible that clothing does not fit", then comes: "I get weld cracks". Then comes "props or clothing does not stay on".

Splitting groups is one of the things builders have to avoid at all cost. (As is loosing symmetry).

It is OK to split groups if that is where your workflow stops.

When my mike is repaired, I"ll upload a video on YouTube with the correct procedure to group object files , maintaining symmetry, and get all the tips and tricks sorted out. I had been planning to make a YouTube series for Poser11 and Poser11Pro, I might as well attack this one first.