Select all objects in a Group and Transform Each will Transform each object WHILE ALSO TRANSFORMING THE WHOLE GROUP TOWARDS IT'S CENTRAL POINT. This directly contradicts the conventional meaning of "Transform Each".
The workaround is to deselect one of the objects in the Group, which is why this is a Bug- the workaround is a kludge fix.
Transform each is not definitely working correctly. Every sublayer is different object? Why?
It has always worked that way, atleast since cs5. Probably everbody hates it, but they don't bother changing it. So wierd.