Hmm, one of the things that pops out as a red flag to me is that your space switcher UI isn’t lighting up red when you scrub. It is supposed to light up red when a frame change happens, then you hit the red button, and it refreshes the UI.
Since that isn’t happening, just make sure you have the latest and greatest files from dropbox. Also, on the control that has the spaces, you should be able to pick-walk up from that control to see what is actually happening with the spaces and if they are truly being switched or not.