Why is Device Manager lying to me about the last driver version for my graphics card?

[rodion15]

I was updating my graphics card drivers for my graphic card PNY GEFORCE GTX 660 and went to device manager, I used “automatically search for new driver” and a dialog box appeared "Windows has determined that the driver is up to date".
Yet, I went to Nvidia website and did a driver update. I checked again Device manager for my display adapter and the new driver was TWO MONTHS NEWER.
I wonder why that happens.