Shapes moving out of alignment in preview mode

Not sure if this helps but I noticed that if you group 2+ items, the distance difference in x and y starts to slide away from the item's original position. The larger the distance the items are from the group's top left corner (or the origin I assume), the larger the offset is and visually becomes apparent. The interesting thing is the published build does NOT display these odd offsets at least in SL360. When upgrouped, all offset issues disappear in preview and in published.

But in "Andrea Opland" 's target.story in SL2 in this thread, the preview AND published build IS reflected with offset issues no matter what. Even when her shapes were ungrouped, these issues displayed in preview and in published. That's why I think her's is related to rotation/flipping issues and not necessarily to just grouping. 

There may be something going wrong in the parent to child transform calculations. Not sure as a lot of this is speculation.

My version in SL360 ver v3.17.16085.0

See my group offset test build attachment for example in SL360.