Hi!
For issue 1:
If you are trying to hide the Key figure through "Key Figure Selection" icon (on the right side of Planning book) then it will not work as the displayed key figures will change to default with every change in selection criteria.
Use Maintain User Settings (Ctrl+F7) and then "Hide Key figures" tab to select the KFs which you want to hide irrespective of the selection criteria you specify in the Shuffler window.
Regards,
Ravi