So i have my bill paid through the automatic top up so i know it takes more than the 10% i get off. I also know that goes into the balance i have. So why does it say i have to owe them 6 bucks? Its increased from before. So the first image is recent and the second one is from 3 months ago.
Don't worry about the balance due, it behaves crazy at times :) Every time your plan renews, you get 10% ($1.50) back in credit. You can do whatever you like with your $9, you can buy a $5 booster now, or wait till you reach $25/$30 and buy a large talk/data booster, or lower your auto top up for a few months until you use it up.
A few months ago your balance was $6, the following month $7.50, now it is $9 - next renewal your balance will go up to $10.50 etc.