Turbotax is doubling the taxable amount of mega back door roth conversion

I am helping my son use turbotax for the first time.  He received two 1099-Rs.  The first one we entered was for contribution to a traditional IRA, which was then converted to a roth.  This is registering properly, and showing no taxable amount.

The second 1099-R is for a mega backdoor roth conversion from his 401k.  code G .  He made an aftertax contribution, and then it was converted to an outside roth IRA,  The taxable amount on his 1099-R is $97. After running through the questions, we saw that the 1099-R summary sheet in turbotax shows:

line 26 taxable amt in box 2a                               $97

line 31 taxable amount of roth conversions      $97

line 32 taxable amount of distributions           $194  (summing lines 26 and 31)

$194 is the amount listed on the 1040 as the taxable amount of the pension distribution. Double what it should be.

 

One weird thing was that some of the questions asked after inputting the pension distribution seemed to be more about making deductible contributions to a traditional IRA.

 

How can we fix this?  If we can't, is there a way to override turbotax, and just put the proper amount on the 1040.?