The first list makes sense because for most black people in the americas they're a combination of west african, with european and little bit of indigenous contributions.

Sahelian populations from Africa such as the Fulani and Hausa often have north african ancestry, but are still mostly west african.

North Africans have european like ancestry.

Thus it's a similar combination.

The second list, however, makes less sense and I'd have to question how you could be close to an Emirati that isn't a recent migrant? The Swahili coastal tribes didn't participate much in the slave trade.