I find that graduated symbols are always drawn over filled polygons (graduated colors) even if the filled polygons are higher in the layer order. Filled polygons higher in the layer order cover filled polygons in a lower layer. Symbols higher in a higher layer are drawn over symbols in a lower layer. This lexicographic drawing order does not follow the drawing order that I see documented.
Am I missing something? Has anyone seen this in the ArcMap 10 documentation, and, if so, where?