Four of 12 might make a lot of noise but what can they do? Enjoy your unit and the company of the other 7.
If I have understood correctly, I think you are saying there was a retrospective approval of the deck. It is not unusual for something that was not done according to correct procedures to be fixed by retrospectively doing things the way they should have been done. That is quite OK. Perhaps these 4 are still fighting an old battle that they lost? That also is not unusual. If the matter was raised with the tribunal and dismissed then that really should be the end of it.