Frustratingly when printing a new printout, say a METAR while something else was printed and pinned immediately deletes it. Having to reprint it again. Printing a new printout while something was pinned should keep it pinned until you click on the new printout.
When a METAR for example is printed and pinned, and then you go and print another item, it immediately deletes the pinned item even before clicking on the newly printed paper. Not sure if this is intentional or not.