Wrong report totals

I have at least one summary income/expense report that is showing incorrect totals. When I open the report and drill down to show individual transactions for a particular category, it shows the right totals. But when I go back to the summary view, the totals are wrong. I've tried editing the report (to use different accounts, categories, etc.) but that doesn't solve the problem. I also tried backing up and verifying my data file, to no avail. I had to delete and recreate the report to get it to work.

I see from the responses to other users' posts that this is a known problem, going back about 5 years or more. I had this idea that accounting software ought to be able to add. I now have diminished confidence that the reports I'm producing are accurate. I use these to calculate and submit my income tax.

Folks. This is not okay. Do I have to delete and recreate all my reports to get accurate results?