when the game switches host, your sprees get reset. and sometimes it screws with your stats. why are you complaining though. the in-game total is what is correct. and that is all that matter for win/loss. i've had this happens across all game formats whether it be snipers, invasion, big team, or swat. it seems that when the game switches host it loses track of a few kills in your stats. and it happens in a very small percentage of games.