Same experience and solution for me. TurboTax put the wrong numbers into my 1040X--they did not match the original numbers from my Form 1040. I took an entire day figuring out what was wrong and how to correct it. I thought at first that there was an error in my amended Form 1040. No. Then I thought there was a phantom entry which somehow was not reflected in my original return or my amended return. No. I finally discovered that TurboTax had simply made an erroneous entry on my 1040X, reflecting the wrong original AGI.
My solution--I pulled down the "view" menu and chose "forms." I pulled up the Form 1040X. I found the erroneous entry and corrected it--everything else recalculated properly. Done.
Apparently this has been a bug for years. Shame on Intuit for not fixing it.
