When grouping parameters, you no longer segregate parameter types.  But when you add something that has dependencies, it will recursively add all the dependencies. I added the ability to add parameters to an existing group and also remove parameters from an existing group.  Unfortunately as now, when a group that is referenced by a family is changed, those changes aren't reflected within the family.  I'm not sure why this is because the family directly references the group database ID.  This will be investigated tomorrow.  Also, adding the stored computed value to the instance of a parameter removed the auto updating of references in the family.  I fixed this at the end of the day.  The report also reflects the changes to a family.