As I change de input of the address...It's restores

[klorp]

I'm currently playing Battle of Zombies, I found 2 Addresses for money:

0x81B178B8 

and

0x81B178BC, 

 

and as I change de amount of money, the quantity don't appear in the game until I use some of It,

And as it appears, It Just flashes in the screen and come back to the amount that I had before.

 

Can someone help me?