DzGroupNone behaviours

Hi,

I have some issues to get a DzGroupNode created in script to behave similar (give the same results) as a DzGroupNode created using Create->New Group... and enbedding the selected node into the group. See attached image,

I suspect that the DS Action does some behind the scenes tricks (that I very much would like to do myself, to get the same behavoir. I do call invalidateBoundingBoxes() in tghe DzGroupNode after the node has been parented to it.