Any reason my rank has reset down to 'Rank 3'? Played for only 10 hours and had a rank of 14. My mate played for 2 hours, got to a rank of 5 and his rank is still 5. My other mate played for about 8 hours and his dropped from Rank 9 to 7.

So I'm pretty sure this is a bug? Or are you just punishing players who have put more time into the game? This makes no sense what so ever.