I notice that you are gounig for Mount Kinabalu Climb in Sept with your friends. Yes, in Sutera Sanctuary Lodge homepage does not shows the RM12 per night stay because there is no room with that rate. You may find other place to stay outside Kinabalu Park HQ, i.e. in Kundasang area, which is about 7 km away. Most of the travelers says that the rate there are cheaper.
The cheapest rate per person in a hostel in Kinabalu Park HQ (foot of Mount Kinabalu) is RM46. It is a dormitory bunk-beds. It is nice for budget traveler and backpackers who are not to particular with their one night stay.
Try www.mount-kinabalu-borneo.com. They have more information about guidelines and tips for climbers who planned to climb Mount Kinabalu.
Hope you will have a good time there!