So, I've set my Macbook Air to have six different "spaces/screens". I.e., if I hold command + 1, I have my e-mail, if I hold command + 2, I have the browser, etc. Since I've updated to Mavericks, my screens keep...moving. Now, when I hold command + 1, it's sometimes my e-mail, but then it'll change to my browser or Skype screen for some reason. I want them locked in on their spaces - like the way they were before the update. Anyone have any idea re: how to fix this?