Hi PullmyFinger,
Thanks for mapping out what’s happening. can see how concerning it is when the balances matched and then changed. I can't give you a definitive fix without digging deeper, so we'll need to figure out what threw it off.
When your MYOB numbers don't match your actual bank statement, it’s usually due to timing delays, duplicate transactions, or payments stuck in a holding account. To start troubleshooting, try doing a future-dated bank reconciliation to see if that squares things up. You can also run a report up to the last date it balanced to see if your invoice payments are hiding in Undeposited Funds, or if a bank feed got allocated as a new transaction rather than matched up. Your best bet next is to reach out to our support team via our Contact page. Pass these troubleshooting steps along to them, and they'll help you get everything back on track.
Cheers,
Princess