I appreciate the steps you've taken to elaborate your concern, @david-hall.
Let's utilize the reporting period when pulling up your Statement of Cash Flows report to identify why you have incorrect report data.
From there, you can open your Transaction List report and investigate every details of your transaction. To add, you can consider comparing your reports from one to the other to check if they have the same data.
But know that your report's data are always dependent on what information you've entered into your account. With this, I've added this helpful article that you can read to learn more about the filters and data of your reports: Targets vs. Sources Overview.
Lastly, I've also added our Help Articles page for QuickBooks Online in case you need some related articles for your future tasks.
If there's anything else that I can help you with, please let me know in the comment section down below. I'll be always around ready to help.