As for the first problem, I think you found a bug.
As for the second: that is a feature. The reason is that in the Profile Manager Dialog you can define any polygonal shape for any of the skins or components of a Complex Profile so there the thickness value does not apply because that skin may not have a constant thickness. That's my idea of it.
Of course, ArchiCAD could be smart enough to know that if you have a component of the Complex Wall that has a constant horizontal thickness, then that field applies. But it is unfortunately not that smart at this point.
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