You are correct, this is not a taxable transaction. Make sure that both distribution codes are being reported in TurboTax. If you imported the form, check manually to make sure both code 4 and code G are in there. When entering Form 1099-R, under box 7, select the box I have more than one value in Box 7. Put 4 as the distribution code in one, G in the other.
Once you verify that you did not convert this to a Roth, the entire rollover will not be taxable.
