Thanks for providing the screenshot, GWE1.
Aside from using the Suppliers Details report, let's try running the Accounts payable aging detail report.
Then, check if the amount matches from your report into the Supplier's tab. If not, you can review the vendors' bills and payments transactions if there are correct, modified or changed.
For more details about the Aging report, you can check out this article: How to get your Aging Reports to match.
Please reply to this post if you have additional questions.