Extra dose?

Hi all, I have a question. I've seen the posts abt some lucky winners having the extreme good fortune to receive an extra dose along with their monthly supply. I jst started and took my 2nd dose today. Based on jst eyeballing it, what's left seems to be exactly 2 more doses. No complaints-I am so psyched abt all of this. I cldnt wait for Thursday to arrive! My question is, are all the extra doses coming from the same pharmacy or is it something that happens with anyone of them? Mine came from Washington. Yours?