The border went down to the brook of Kanah, southward of the brook: these cities belonged to Ephraim among the cities of Manasseh: and the border of Manasseh was on the north side of the brook, and the goings out of it were at the sea:
Now Ephraim and Manasseh were two of the larger tribes, and they were the sons of Joseph. So that when it refers here to the tribe of Joseph, it is actually referring to the double tribes of Ephraim and Manasseh. Because they had so many they said, "Why have you just given us one lot? We really are so big we should have two lots." That is in the casting of lots they would, they divided off the land, they made a map and divided off the map, and then they would cast lots, who would get this portion, and they said, "We've got so many people we really need two lots for the tribe of Joseph.So Joshua agreed to it that there should be two lots given to them. So they drew another lot so that Manasseh was dwelling next to Ephraim on the West Bank, and the other part of Manasseh, of course, was over on the east bank on the other side of the Jordan River. "