I think everyone but Phillip realized that zap's rice was theirs. Andrea asked if they could use their urn, and the Zaps said no. Phillip was the one going off about the whole thing and pretty much escalated the issue. I don't think anyone from the Omatepe tribe said anything else about it, did they? I wonder what did happen with the rice. I guess it would have been impossible to haul the container down and scour it will with sea water, as it probably wouldn't have had time to dry thoroughly so any rice put back in would go mouldy immediately.
I don't agree with Phillip stealing their rice, either. That was totally rude and uncalled for. I think Rob had a confessional where he said that perhaps when all the Zap tribe were gone, the "old Phillip" would come back. I think they had Phillip in a good place before the merge, where he wasn't so hard to be around. Since the tribe, his behaviour has gone back to the first few days. Maybe he isn't good with new people, it throws him off and until he finds his place and adjusts, he's totally unhinged.