Hi, I've been using Maps, and noticed that some pins are purple and some are red. If you tap a purple pin to get the menu, 'Remove Pin' is one of the choices. If you tap a red pin, however, 'Remove Pin' is *not* included on the menu. How do you remove a red pin? It should be fairly intuitive. Can someone please tell me? I really want to get rid of that pin. The guide just says "Tap 'Remove Pin," which would be the easiest thing if that choice were available in the case of red pins... Second, I ask out of mere curiosity, why are some pins purple and some red? Thanks as always!