yolan
Why is it still 2?
well ... such error are often created when there is a var not in the proper scope "bracket symbols"... else than that you should make sure you Log your error only at the end of everything not in the middle since you do tons of math it will get confusing finding the error....
for me your code is so simple that it is not a bug , it behave like it should ...
there is also the possibility of you erasing a variable with the "=" operator !
at your place i would try to make the code more clear and take time to read every line ! ... some time just sleeping on it and coming back in the morning ; you get to see more clearly
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