The points posted correctly and without a hitch to my GP account for all the 4 hotels we stayed at. During check-in at the first hotel, I asked if all the points could go to my account, the agent said it was no problem as long as all three rooms were put under 1 bill during check-out. So in subsequent hotels I asked for the rooms to be put under 1 bill. I was also told that I could only get points for max 3 rooms.

Of course I could only get 1 stay credit for each of the hotels.