Why is Aus Post Business showing different flat rate shipping costs?

Hello, I was wondering if anyone could assist:

We are about to launch our business so I’m having a play around in Shopify doing some dummie orders & have discovered an issue with our flat rate shipping cost.

We have the below rules for our customers:

$10 Flat Rate for orders under $100

$15Flat Rate for orders between $100 - %200

FREE for orders over $200

When I did a dummie order AusPost has set the shipping as $13.25 but on the order summary it is $10? Can anyone please assist me with this?

I am so confused :disappointed_face: