both Madhibaan and Anaas (Yibir) have their own separate languages. And that would suggest they had a period of isolation from the rest of the Somalis or other horners. How long that was remains to be seen, but it is obvious they once had a territory of their own and were distinct groups.
That being said, a few individuals testing their haplogroups won't prove much. To make sense of these haplogroups, the majority of clans needs to be tested, but that is not possible at this point. I would say don't read too much into the haplogroups at this stage.