I am not sure, but I know from experience that Dance floor is pretty hard. If over 2000 rounds, I only have 70 or so of such awards, so it just says how hard they are.
If there is an issue, we would need detailed report to see within game, so please, next time when you have 100% GIR, check your awards before quittting the game and if it still is not showing, please right click on the game window and submit detailed report. Explain exactly what you expect, what actually happened, and put wgticon in subject so it can be found easier.
Thank you
-wgticon