Regarding the Scale manipulator,
Open up the tool tab (T) and check what active tool you are using.
I bet it’s the scale tool – which overrides the settings you are showing.
Don’t worry, this catches me out ALL the time – I’m not a fan of this design.
Regarding the camera linking, the camera is not part of the rig so maybe you have that linked in from a separate file?
And Child of Constraints can be a big pain in the butt.
Let me know if you have this issue from a fresh file (linking in fresh I mean), or if it’s just happening with this file.
