Contour loads should be glued to the panels they´re applied , so in case you have to copy/move/rotate the panel,you don´t have manually " carry" the contour load to its new position.
Same occurs to linear load 2P.
Also for linear load 2p, when you select some panels to edit in another window ,all linear loads 2p applied in any place of the structure show up in the new window .If you have lots of line loads ,it gets difficult and very confusing to find good angles to edit/check the load you really want to.