Hi KHC19,
I've moved your post to the right board over here. Once you've turned on the automatic matching and categorising setting it tries to match transactions from your feed with existing MYOB transactions automatically. Therefore, it's essential to disable these features to prevent automatic matching. For more info, check out this link. If MYOB continues to automatically match transactions even after you've turned off these settings, your best bet is to get in touch with our support team through any of the options available on our page.
Cheers,
Princess