@Som
Those Afars in those genetic studies are real Afars. The error was the Xamtanga typo, not that they are not Afar. The Taforalt study had new Afar samples and there was a new 2019/2020 Ethiopia study
[1] that had new Afars as well. They are basically the same as those earlier Afar samples. Afars cluster near Amharas but with less Omotic affinity.
That guy is not a full blood Somali. He has Bantu admixture. He comes from the riverine areas with Bantu settlement.
It actually doesn't. More often than not, a Habesha has kinkier hair and a wider nose than a Somali. The only thing that makes them look more Semitic is the lighter skin and more prominent nose, but usually Habeshas have more Negroid hair and wider noses than Somalis.
You seem to not have met many Habeshas. Moreover, Afars and Amharas are basically not that different in Eurasian-African %.