True that it entered the chart on December 1st and true that some source said it was released on the 13th (Wikipedia and Amazon for example) ...
Here is a report on what happened in 1990 :
http://en.wikipedia.org/wiki/1990_in_musicHard it is to evaluate how reliable these sources are. I for one know that Deb wrote the 20th in the good old DGIF Magazine and I was constantly keeping in touch with my local record store to make sure it was really on the 20th and I bought it that same day.
So the 20th will always be a special day to me. Yet November 13th is not impossible, but I'm waiting to see an unquestionable source of information that says so !