These maps demonstrate a peculiar rendering artifact of this offshore US areas topology. The red lines are the GeoJSON geometries extracted with topojson.feature(), and the bluish ones are the topological meshes courtesy of topojson.mesh(), with a slight offset to make them more visible. The features are also drawn with a very transparent yellow fill to make overlaps more obvious.

As you can see, the state boundaries from this topology look great in the first map:

In this map, however, you can see two things: First, that all of the features are being drawn on top of each other across the outer clip extent of the projection. Second, you can see that the topojson.feature() is producing polygons with rings that coincide with each of the Albers USA clip extents for the lower 48, Alaska and Hawaii: