"Almost always the DCC amount will be held for the pending transaction. In most cases, you won't know if it was without or with DCC until the transaction posts"

This is exactly what happened...

Great knowledge on this forum and I'm learning fast.

It was showing as AUD$127 in the pending transaction history and has now been posted as AUD$120 which ties in with the MC rate calculator so in the end I wasn't DCC'd

It's a relief I don't have to chargeback for 7 bucks but I would have done so on principle

This whole issue sucks, millions of $ siphoned off for nothing