Chronicles I ch.7 - Lost Records, and a Premature Exodus

Why is there so little information on the settlements of the tribes Yissachar, Naftali and Asher? The key information is a military roster from David's army, not a register of villages and towns.And we shall visit verse 21 and a curious Midrash about the Tribe of Efrayim who left Egypt too early and who were massacred.