What was the difference between the land promised to the 9 1/2 tribes and the land taken by the other tribes?

"This week’s essay is in in loving memory of my uncle Jack Ribnick (Yaakov Eliezer Ben Nechemia Mayer) Z”L"

The area promised to Avraham is much, much larger than most of us imagine. In fact, even the most “extreme” ... do not dare dream of the borders promised to Avraham God spoke to Moshe, telling him to give the Israelites instructions and say to them: ‘You are coming to the land known as Canaan; this is the land that you will inherit, the Land of Canaan and its borders.’ (Bamidbar 34:1-2)

Understanding the mitzvot found in Pinchas and Matot, and why the narrative was interrupted

Either we may view these laws as an interruption of the narrative, randomly inserted at this juncture and therefore unrelated to the issue at hand, or we may attempt to analyze these laws in order to determine if, in fact, they are logically, intrinsically connected with the narrative...