In the following screen shot there appears to be a significant difference in the heliocentric coordinates reported in the Venus Info window and the cartesian coordinates reported for a stationary location at the centre of Venus. Shouldn't these be the same? Why not report spherical coordinates as well as cartesian coordinates in both windows and to the same precision?
(Use the "Venus orbital nodes" file and open the Venus info window. Go to "Options", "Viewing Location" and select the centre of Venus instead of the centre of Sun, then switch to "stationary location" to get the coordinates of the centre of Venus.)