mcd3,
I input my own tax return last night which has short term and long term stock capital gains entries, qualified dividends, and mutual fund capital gains distributions. This morning I entered the requested information into the 2210 AI dialogue and it did calculate it correctly matching my own penny-precise hand calculation using the Qualified Dividend and Capital Gains worksheet.
I recommend you make sure to update to the latest version (if you are using a desktop TurboTax) and try again. Let me know if you are still having anomalous results and we can dive deeper.