Is it the statement that says "This Use Years points will expire at the end of September 2013." when you click on My Points?
If so, they mean the current UY which for you is currently the 2012 UY. With October, most of your UY falls in the following calendar year. Now, if you are seeing it somewhere else, then definitely call! Right now, any points you see as available, are your 2012 UY points--your banking window for those points was May 31st. If you did not bank them, I would definitely give MS a call to see if they will give you a one time exception as those will expire on September 30th, 2013.