I'm curious where did they get their 18 Polynesian samples from? Were their samples actually from Polynesia, or from areas outside of the Polynesian triangle? I've never seen so many SEA having a very high percentage of Polynesia, yet some Polynesians (namely Hawaiians & Maoris) aren't showing as much as the SEAs.

Then it was obvious one of their samples was obviously European admixed but they decided to incorporate that into the description of Polynesia. Ancestry doesn't know exactly what they are doing.