That's what I was confused about too. I expected it to be the latest version. Some companies have done odd things when releasing firmware, like my Samsung TV having a new FW but the version number was below what I already had, and Asus releasing a beta driver for my sound card that updates the FW but it is just a bug and the FW is actually identical to what was already on the card. So I just assumed this was new.
The only thing I could think of for not posting the latest FW is that there wasn't much of a change and there is always a risk, even if it is very low, of bricking your device.