Quite often when the game is quit it does not save and is left a few minutes behind
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Yes, I am pressing escape and then Save and Quit to title because it usually happens when I'm switching world
Hmmm. I don't know then. Maybe try allocating more memory to Minecraft, or maybe try waiting at the pause screen for like 30 seconds before exiting. If those don't work, then I guess just wait for an admin to tell if it's a bug or not.
Are you sure that you are pressing ESC and then closing the world? When you press ESC in SP, which is what I assume that you're playing in, it saves the world so that you can just press the title screen button immediately. If you close it by other means such as task manager or alt + f4, then it might not save it all. This may or may not be the case, but I hope that it works next time.