Indeed, I replicated the same behavior. On debugging the code I noticed that the first call returns data starting at the 3 Nov 2010 even through the request is for starting at 1 Nov 2010. As a workaround I chose 10/1/2010 as the start date to make sure that data was retrieved for the beginning of November. In any case, we will look into whether the source page has changed in any way (as this happens from time to time) and update the code accordingly.
