I saw this entry by DragonSkunk in Feedback Tracker:
http://www.reallusion.com/FeedBackTracker/Issue/Props-skew-instead-of-scale

I think it has to do with sub-props being rotated relative to the parent prop.  Or something like that.  Then all sorts of odd (and potentially powerful) things happen when you scale the parent.

I'm not at my iClone computer right now so I can't be more specific.  Hopefully sometime in a few hours (unless someone else gets to it before I do.

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iClone 7... Character Creator... Substance Designer/Painter... Blender... Audacity...
Desktop (homebuilt) - Windows 10, Ryzen 9 3900x CPU, GTX 1080 GPU (8GB), 32GB RAM, Asus X570 Pro motherboard, 2TB SSD, terabytes of disk space, dual  monitors.
Laptop - Windows 10, MSI GS63VR STEALTH-252, 16GB RAM, GTX 1060 (6GB), 256GB SSD and 1TB HDD