Retirement tax questions

Turbo tax is not calculating the exclusion amount correctly for Colorado.  

There is a pension worksheet that calculates the limit correctly, but the Form 104AD does not apply the limit to the taxable social security amount if it is over 20,000 and is subtracting the entire amount.  My taxable social security is over 24,000.  The form excluded the rest of my retirement income, but brought the entire SSA amount over to form 104 when it should have been limited to 20,000.  It is understating my Colorado taxable income and the program will not let me correct it.  I called support, and they agreed with me that it looks incorrect.