You can blame me for never really cleaning that up properly, although I've had an intention of doing it numerous times. For consistency in scripting, commands like

box values

,

box height

,

box position

always return values in internal units, but commands like

box move

take values that depend on context. If you start out with

snap internal

, then all dimensions will be in internal units and all the commands will agree (and you won't have to type

i

after all the dimensions).