It would be helpful after carefully placing macro objects that if they need to be replaced with a different macro object at the same location...maybe something like
(1) right click the object
(2) popup menu > click "replace"
(3) select macro object in sidebar
(4) click "enter"
OR
(1) select macro object in dwg
(2) click a new "Replace" button maybe in macro sidebar
(3) select the macro object in sidebar to replace with
(4) click "Enter"
(1) right click the object
(2) popup menu > click "replace"
(3) select macro object in sidebar
(4) click "enter"
OR
(1) select macro object in dwg
(2) click a new "Replace" button maybe in macro sidebar
(3) select the macro object in sidebar to replace with
(4) click "Enter"

