Parenting works until the last step of the video...

The rigging  seems to be going well, but when I try to scale the Base_squash_bottom and Base_squash_top back to the origin the parenting seems to stop working. Up to that point, my base_def_in moves the treasure chest and my Base, Base_squash_top and Base_squash_bottom all move with one another. 

Thanks for any assistance you can provide!