The one we stayed in had 1 balcony, but 2 access doors. You can access through the master bedroom and the living room. I can't remember if they were sliding doors or not though.
Depends on the room. We have been in a room that had one (large) balcony that you could access from both livingroom and bedroom. We have had rooms that had 2 balconies - one from each LR and BDR. I think I even recall one room that had one small balcony only accessible from the livingroom.