Now set the groups anchorChildren = true and change it’s anchor points. That will give you a head ache! 
Oh just a suggestion. When placing objects in a container I always leave anchorChilder = true. That way you always position objects from it’s center and changing anchors only changes the position of the container not the children layout inside the container. I find it creates less problems for me.
I was tinkering around a lot with the containers that I had actually forgotten I had set anchorChildren to false.
But yeah, it makes sense :)
Thanks!