>>717091 (last bread)
Northern Israel at that point was not all of the ten tribes. Prior to that, the Northern tribes had devolved into idol worship. The tribe of Levi (priests) no longer were required or welcome so they then migrated south along with those who rejected idol worship and still remained true to the Temple. Likewise, those in the southern regions that wanted to worship idols migrated to the northern region. Thus, the traditional family regions were dispersed and intermixed so that there were members of all of the twelve tribes in both the northern region and the southern region.