OSX 10.9.2 for the second time I got OSX 10.9.2 update installed on February 26th. Today (March 5th), without prompting, I got another update. The description of the update in App Store is identical. Any idea what  this update was?
I see you downloaded multiple apps after the 10.9.2

One of those might have done something to the App Store log saved on your computer.

So when checking it id not find and did the 10.9.2 again.

Check this and see if it fixes the problem.