I am playing deer hunter 2014 and purchased 100 coins. I used 85 to purchase a gun. Coins dropped to 15. Next thing I know I have 100+, then 200+, and so on till I hit around 900. Next day it drops to 9 and now it's back up to almost 700. Anyone know what's going on? If I use them am I going to be charged for the additional ones I used?