Your woods not grouping well could be from several differant things. Points not installed true to the shaft. And or not staight. If they bareshaft tune very well, it makes no sense they do not group well all things being equal.
And as Claudia says, bareshaft should impact a little left of center, showing a slight weak spine. And also pay most attention to point of impact, (bareshafts a little left of fletched) for a right handed shooter)
Good luck and our hopes for a successful season
Brent