Extra 10 Raids Bug
There Is a bug that has existed for some time in the game that many have heard of but which has not altered the balance of gameplay so may not have been reported (I can't find a report of it anyway).
This bug gives a player an additional 10 raids for no apparent reason. I do not know why, but they suddenly appear. This week in the top 10 raids it appears that the outcome has been manipulated by use of this bug within the last 24 hours by the top 2 players who each would have had to use this bug multiple times to achieve their current rankings.
Here is a screenshot of the rankings approximately 13 hours ago (provided by a friend)
http://prntscr.com/m9nwds
Here is the screenshot of the rankings today.
http://prntscr.com/m9npkr
While I recognize there is some volatility in rankings, terrible 10 raiding is more predictable than most Terrible 10 tournaments because raids are awarded equally across the board on a time based system (10 raids per day on a typical day). Functionally, winning raids terrible 10 is done on the first day of the tournament and then continuing (not messing up) the advantage from day 1.
The fact that two players both got +10 raids twice in a 24 hour period indicates players have figured out how to manipulate this bug and do it repeatedly and intentionally. Given that, priority should be given to fixing this bug.