The 2D error bar is a LabVIEW object, not exactly a graph / chart indicator. This means, that the same properties might not apply. This is not a bug, but the way the 2D error bar was developed.
Have you tried the Bounds > Area Height/Width or Graph > Bounds Height/Bounds Width properties? Maybe you can find a workaround with those along with the Cursor > Plot Area or Cursor > Position properties (I haven't really looked into them).