Within Issachar and Asher, Manasseh was assigned Beth-shean, Ibleam, Dor (that is, Naphath), Endor, Taanach, and Megiddo, each with their surrounding settlements.
11. And Manasseh had in Issachar, etc How they were so mingled as to possess some cities in the lot of Asher and Issachar, while the tribe of Ephraim dwelt between their limits, it is not easy to divine, unless, perhaps, it was perceived that a more commodious habitation would not be liable to many complaints, Latin, “Nisi quia forte perspectum est; nec habitatio commodior...
We have here a short account of the lot of this half tribe. It reached from Jordan on the east to the great sea on the west; on the south it lay all along contiguous to Ephraim, but on the north it abutted upon Asher and Issachar.
Commenting on Joshua 17:7-13
And Manasseh had in Issachar, and in Asher, Bethshean, and her towns,.... As Ephraim had cities in Manasseh, so had Manasseh cities in these two tribes, which in some parts bordered on it, before described, even the cities following, and the first that is named is Bethshean: this lay in the tribe of Issachar, and was the uttermost border of Manasseh that way; it was...