*I do not know the answer to your first question, but this may help you...
On the drawing, click the group or groups you want to make non-locatable.
Right-click to display the shortcut menu, and then choose Make Non-Locatable.
You can also select the group you want on the Group tab in Library.
When you make a group or groups of elements non-locatable, the symbol next to the group on the Group tab changes to indicate the group is no longer locatable. You cannot select the group in the graphics window later.
To make the group or groups locatable later, click the group name on the Group tab, and then choose Make Locatable from the shortcut menu.