I noticed some very strange behavior just now after purchasing some wow tokens.
Upon purchasing and redeeming the first one, I went back to the AH to buy another, and it wasn’t letting me for some reason. Clicking on the “buyout” button just didn’t do anything, so I logged out hoping it would get fixed upon relogging.
Well once I logged out and got to the warband screen, 2 of the 4 characters in my main list were completely gone. It turns out that they, along with all of my other most frequently-played characters at the top of my warband list (but not those other 2 in my “4 favorites)” had been moved to the very bottom of the list.
After dragging them all back to their proper positions, I logged back in and bought 4 more wow tokens. Upon purchasing each one, my friendly nameplates option turned on. As in: I bought a token, the nameplates around me in the auction house all turned on (I keep them off by default). So I turned them off, bought another wow token, and boom, they all turned on again. Repeat this 4 times.
Not game-breaking bugs, but certainly odd, and might relate to other ongoing bugs with this game.