Here's a quick fix to "Unlinked Groups"!

2 ways to go about it:

-first-> Load Poser, Load the "offending" cloth's .OBJ from
"Geometry Folder", then click on "Group Tool".
Now, look up the "Unlinked" groups first to see if "lBreast"
looks like it's the lCollar! If it seems to match, then simply create a new Group called "lCollar" then click "include group", select "lCollar", now delete "lBreast" Group. Voila! ReExport .OBJ under a different name!

-Second-> Open .OBJ in UVMApper, then select "lBreast" group
then "reassign" it to a new roup called "lCollar", delete "lBreast" group! Resave .OBJ under different name...

I'm sure there's others ways too...

One note here: I found 25 items so far that had to be fixed
like that! Some of them even had "eccentric" named groups,
specially in ones from the Orient... The advantage of doing
it with the Group Tool in Poser, is you can visually see what those groups are! I had a Cloth .OBJ with over 20 such "Redundant" Groups! Meaning, that the "Concerned Faces" were already part of the correct "BodyParts"!

Another quick note: Example that i will use is Billy-T's China Dress. It has 5 or 6 new Groups called "Front, Front1, Back, etc... Do Not Delete these! With those, you simply "Link them to Actor" in P-Wizard!!
How? Use the "Create Actor" Button, select "hip" from list then Start with "Front" group(Which is the highest up on Hierarchy of the Dress). Then click "Front1" & link it to "Front" & so on...

Of course, this means understanding the "Hierarchy" of your Cloth Model! When in doubt, just Open Poser in BackGround &
load the Cloth figure! ;-)

So, in retrospect, A lot of the Utilities such as P-Wizard require that the "Naming Convention" be very precise!
Anything out of the "Standard" causes "HickUps". But, with
a "Fresh Coffe Pot" & Home Baked Cookies Nothing's beyond
your imagination...

Oh! When you purchase P-Wizard, you'll receive an email with link to other Add-On Wizards: I've got:

Conforming, DialWiz, MatMor, OBJ-Ripper(Love that one) & Packaging.

Marco