CRS-priced wrong

my calculations for croesus show that for every dollar increase in the price of gold , adds approximately 1 cent value to croesus.The market has generally followed this give or take a little .Today I am amazed .What gives .Two days ago croesus was trading at these same levels .Should be trading at 66c-67c at least. Is it a short term anamoly ? A trading opportunity ,or is someone selling into the spike.Or has the market just plain got it wrong.
cheers Brenden