I found this very interesting too. According to Ancestry I have a very weak connection to African American genetic communities. That's really weird.
I came back to:
Genetic Communities™
African Americans in the Deep South
Connection: Very Likely
African Americans in North Carolina's Northern Coastal Plain
Connection: Possible
What are Genetic Communities?
I didn't even realize that Ancestry had a large database for the Caribbean until my aunt got her test results back and she came back as not only a match to African Americans in the Deep South, but she also matched African Caribbeans in the Greater Antilles. Ancestry is getting better and better. For whatever reason I don't match the African Caribbeans in the Greater Antilles, but in separate GedMatch results I came back as match to Dominicans and Puerto Ricans.