That is OBject Data, you need to have say CIV3D or Map to get at that info.
(setq ent (car (entsel "\nPick object with OD data ")))
(setq odname (ade_odgettables ent))
(setq Stnum (ade_odgetfield ent odname "STREET_NUMBER" 0))
(setq Stname (ade_odgetfield ent odname "STREET_NAME" 0))
Try "Name_0" for the data name in example code.
The offset error can occur as ACAD and offers use some smarts to speed up zooms, did you do a regen ? Then it should align spot on. When plotting it is ok as well. There is some variables that you can set that alters the straight segments to visually look like curves, you can get circles to look like polygons if pushed low enough.