text: Thanks for your feedback. 
  This OSM notes are used to coordinate the work of the OSM mappers worldwide. Therefore there should be no personal notes in this system. So thats the reason I delete (set as done) your note.
  If you just like to set a personal "point" on the map there is a function on the right panel on osm.org to set one marker. Or you could also use UMAP (http://umap.openstreetmap.fr) to work multiple and with customized markers.