I have the same problem, it always think i have 49.0.2623.87.
And another thing, every time I add Chrome to the "do not update" list it doesn't stay added the next time I run start the updater.
This is only an issue on one of my computers, can give more info if you want.
Speaking of Chrome, if the update was silent and didn't start Chrome afterwards I would be very happy. This happens on all PCs I believe.