‘ And there fell ten portions (literally ‘lines' - portions set off by lines) to Manasseh, beside the land of Gilead and Bashan, which is Beyond Jordan, because the daughters of Manasseh had an inheritance among his sons, and the land of Gilead belonged to the rest of the sons of Manasseh.'
The portions would not be equal portions but probably divided according to the land involved and the numbers of members or families in each sub-tribe. Thus the portion for the daughters would be that which would have been allocated to Hepher, divided between them, taking those factors into account. So Manasseh received portions in both Beyond Jordan East and Beyond Jordan West.