Cheat Engine

[d3mona]

(I only got up to tutorial 7.)
I found the address by using a string value. 0/100 into 100/1. I changed the value, the changed can be seen in game; however, the changed valued doesn't apply. The value I changed revert back into original values.
There are also other value I found similar to this behavior. I added a picture to help explain what I mean. I hope the 0/100 to 100/1 helps.
I have two question:
1) does the game not take the string value to calculate stuff? In other words, is there a different value that I have to change for the changes to occur?
2)how do I use the string value to find the real value I want to change?