The point I was trying to make is yesterday there were none of the usual Double counts during normal hours, they saved them up and did the one large AH Cover trade for the entire 8m.
When we have the large AH trade we usually have a very low short number for the day, because they covered it immediately at the end of the day.
Also the AH Cover is always LOWER than the last large trades, giving the MM a profit for the days work.