Titanium adding 1 error

Titanium adding 1 error

I am making an app, but when I try to add 1 to 8 it changes the number to 1?
This is my code:
var classcountint = parseInt(classcount);
classcountint = classcountint + 1;
if(classcountint<21){
Ti.API.info(file.read());
if(classcountint<10){
Ti.API.info(parseInt(file.read())+1);
file.write("0"+classcountint.toString());
Ti.API.info(file.read());
} else {
Ti.API.info(file.read());
file.write(classcountint.toString());
}
Ti.API.info("Count: "+file.read())
}else{
alert("Max. number of Classes added!");
}