Currently its showing Overture results for December. A few days ago it still had November resules. It says at the top what month it for, and it updates around this time of month usually.
Buying any domains based on low Overture numbers is particularly risky. The value of a name shoud not be solely on what Overture says, especially if the name is recently expired. Numbers of 25-50 often only indicate domain speculators checking on a domain prior to the drop.
Also these number are very easily manipulated. You can go to altavista and search for a domain, hit your reload button 25 times and have an Overture domain+ext result next month. So buyer beware always. True type-ins can only be measured by actual stats.