Thank you for contacting me. I deleted them as part of the mapping update work on the entire lisbon metro network, as you can see in other stations such as Quinta das Conchas, Cais do Sodré or Baixa-Chiado, the new standard for stations associates stop-position with stop_platform and with the station 
 area itself instead of an node , as in Saldanha station https://www.openstreetmap.org/way/1197171790 .  I forgot to map Picoas station which I will do quickly. Compliments