Why is my statement split into two balances?

If you've got an Instalment Plan, you'll see two categories of balance on your monthly statement.

The first is made up of your standard, cash, and any promotional balances.

The second is your Plan balance. This includes any purchases you've moved to a Plan and the one-off fee.

These two balances are added together, to make your overall account balance. And they're both included as part of your existing credit limit.