Hmm - maybe download your csv data and see if it reveals anything? It could be some kind of rounding. There's also http://www.windowsazure.com/en-us/support/understand-your-bi... which might hint at something.
Seriously --- all the detail is right there. http://imgur.com/KXm8BHO And if you click "Download usage details", you get a csv of daily per-service usage data.
Hmm - maybe download your csv data and see if it reveals anything? It could be some kind of rounding. There's also http://www.windowsazure.com/en-us/support/understand-your-bi... which might hint at something.
Seriously --- all the detail is right there. http://imgur.com/KXm8BHO And if you click "Download usage details", you get a csv of daily per-service usage data.