Why is ACB amount shown in Proceeds of Disposition column in 2091?

[sajidn]

Hi, I purchased a house in 2015 and transferred 50% interest to my wife in 2018.  I entered half of purchase price (in 2015) in ACB and half of Fair Market Value (in 2018) in Turbo Tax standard.  After entering these details, the system shows the ACB amount entered under Proceeds of Disposition on form 2091 instead of the Proceeds Amount.  Why? 

[TurboTaxSusan]

Please make sure that your software is updated, and that you have put the correct amounts on the Principal Residence Designation Worksheet. If you are still unable to resolve this issue, please contact our phone support as they will be better able to assist you (*Not available for TurboTax Free users*). https://turbotax.community.intuit.ca/replies/3152013