Why does my bread smell like vinegar?
I also emailed KAF my question. They think ferment time is culprit. I will have to give it a try. 


  Could it also maybe be combo of time + yeast? Bread is still tasty; I
  am still experimenting.
  
  stephen


Here is reply from KAF:


  Hello Stephen,
  
  Thank you for contacting us here at King Arthur Flour.
  
  The vinegar-ish smell you describe is from the acids of your fermented
  dough. If it bothers you, you might try fermenting your dough in a
  slightly cooler room, or for a shorter time. This should help.
  
  Please let us know if we can be of further assistance or if you have
  additional questions. If you need immediate assistance, feel free to
  contact us directly at 800-827-6836. 
  
  Thank you again and have a great day! 
  
  Sincerely,
  
  Jaydl
  
  King Arthur Flour  800-827-6836